Finger Mathematics - How to calculate Faster than a calculator Mental maths - 10

Summary

The video teaches a unique mental math method called 'Chison Bob,' which helps students solve addition and subtraction problems quickly using their fingers as an abacus. The instructor demonstrates how numbers from 1 to 999 can be represented on fingers, making calculations fast and efficient. The method minimizes mental effort by allowing fingers to hold and manipulate the numbers. It’s referred to as 'Kung Fu Mathematics' due to its rapid finger movements. Viewers are also introduced to simple rules for overcoming limitations and encouraged to practice for proficiency.

Takeaways

• 🧠 The video introduces a mental math technique using fingers to perform fast calculations, similar to an abacus, called 'kung fu mathematics.'
• 📚 The technique is based on the book 'The Complete Book of Chisenbop' by Young Pi, which teaches how to use fingers to represent numbers and perform calculations.
• 🖐️ The right hand is used to represent numbers from 1 to 9, and the left hand is used for multiples of 10, allowing users to represent numbers up to 99.
• 👍 The method reduces mental effort by allowing the hands to do most of the work, helping the brain to relax during calculations.
• ⏱️ With practice, the technique allows users to perform fast calculations by quickly switching between different finger representations of numbers.
• ➕ The method can handle addition and subtraction problems efficiently, with an example showing how to add 73 and 25 using finger positions.
• 🔄 A key aspect of the method is flexibility in overcoming limitations, such as when running out of fingers for higher numbers, by adding and subtracting creatively.
• 🔢 The method can handle numbers beyond 99, with a specific approach to representing numbers in the hundreds using the same finger principles.
• 📈 The video encourages practicing the technique to master it, with a challenge problem for advanced learners: adding 482 and 394 using the method.
• 🎮 The creator has developed a math game called 'Math Blob Run' to help viewers practice mental math techniques like Chisenbop in a fun way.

Q & A

What is the main focus of the video?

The video teaches a method called 'Chisanbop,' also referred to as 'Kung Fu Mathematics,' which allows students to perform rapid addition and subtraction using their fingers as an abacus.

What are the benefits of using the Chisanbop method for calculations?

Chisanbop reduces mental stress by relying on finger movements to keep track of numbers, allowing the brain to focus solely on counting rather than maintaining and updating the entire calculation process in memory.

How does the right hand represent numbers in the Chisanbop method?

In Chisanbop, the right hand represents numbers from 1 to 9. Each finger position corresponds to a specific number: for example, a raised thumb represents 1, and specific combinations of fingers represent other numbers up to 9.

How are tens and larger numbers represented using the Chisanbop method?

The left hand is used to represent tens in Chisanbop. Each finger raised on the left hand corresponds to a multiple of ten: for example, a raised thumb on the left hand represents 10, and additional fingers raised represent 20, 30, and so on, up to 90.

What are some limitations of the Chisanbop method?

The primary limitation is that the method can only represent numbers up to 99 using two hands. For calculations involving numbers greater than 99, additional strategies, such as adding and subtracting larger groups or using creative substitutions, are needed.

How does the Chisanbop method handle addition problems beyond 100?

For addition beyond 100, Chisanbop uses a different representation system where the right hand symbolizes the hundreds digit. For example, a fully closed right hand with no fingers raised represents 100, and fingers are gradually raised or half-raised to signify hundreds along with tens and units on the left hand.

What is the key to mastering the Chisanbop method?

The key to mastering Chisanbop is practice. The faster one can switch between numbers on their fingers and apply the rules, the quicker they can perform calculations. Regular practice helps in achieving proficiency in using finger combinations efficiently.

How does the Chisanbop method make subtraction problems easier?

For subtraction, Chisanbop uses a complementary technique by adding and subtracting from existing finger positions. For instance, if fingers cannot directly represent a subtraction, the method uses equivalent additions and subtractions to adjust the position, simplifying complex subtractions.

What is an example of using Chisanbop for an addition problem?

For example, to add 73 and 25: first, represent 73 using the right hand (70) and left hand (3), then add 20 by raising two fingers on the left hand, and add 5 by raising another finger on the right hand. The final representation will show 98.

Can Chisanbop be used for numbers beyond 999?

While theoretically possible, Chisanbop becomes impractical for numbers beyond 999 due to the complexity of representing thousands and tens of thousands with fingers. It is recommended to use the method for calculations up to 999 for clarity and efficiency.

Outlines

00:00

🧮 Introduction to Kung Fu Mathematics and Speedwrite Tool

This paragraph introduces the concept of solving long addition and subtraction problems quickly using fingers as an abacus. It also mentions the video’s sponsor, Speedwrite, a tool that helps students with assignment deadlines by generating unique text from existing content. The video aims to teach viewers how to use their fingers for fast calculations, a method referred to as 'kung fu mathematics' or 'Chisanbop'.

05:03

👊 Basics of Chisanbop: Finger Representation of Numbers

Here, the concept of using fingers to represent numbers from 1 to 99 is explained in detail. The right hand is used to represent numbers from 1 to 9, and larger numbers are represented by specific finger configurations for tens and units. Practical examples, such as representing 12, 28, and 36, are provided to illustrate the method. The paragraph emphasizes how this technique allows for fast and efficient calculations with practice.

10:05

✋ Finger-Based Addition Example: Adding with Chisanbop

This paragraph demonstrates how to use the Chisanbop method to solve an addition problem. It walks through adding 73 and 25 using finger representations, explaining how the brain can rest while the fingers do the work. The method allows students to perform fast calculations without the need to keep track of the answer in their minds, as the hands hold the ongoing total.

🎯 Overcoming Limitations of Fingers in Chisanbop

Here, a limitation of using only 10 fingers is addressed when adding numbers that exceed what the fingers can directly represent. For example, in the case of adding 32 and 28, creative adjustments like adding 50 and subtracting 30 are used. The method’s flexibility with such rules is highlighted, and a subtraction example (54 minus 32) is provided, showing how the technique applies to both addition and subtraction.

🔢 Complex Long Addition Using Chisanbop

This section presents a more complex addition problem with multiple numbers (15, 12, 19, 29, etc.). The method’s strength lies in its ability to add numbers without keeping track of the running total mentally. The technique of using finger rules to add and subtract efficiently is showcased, further illustrating how students can handle long strings of numbers quickly.

💯 Extending Chisanbop to Numbers Over 100

The paragraph introduces how to represent numbers beyond 99 using Chisanbop, specifically numbers between 100 and 999. By folding fingers and using half-opened configurations, numbers like 153 can be represented. The method becomes more complex as numbers increase, and it is suggested to limit the technique to numbers under 1,000 to avoid confusion. An example problem (adding 68 and 49) is worked through to show how the method extends to numbers beyond 100.

🎮 Practicing Chisanbop and Mastering Mental Math

The final paragraph encourages practice and mastery of Chisanbop, with a challenge to solve the problem 482 + 394 using the method. It also mentions a game developed to help with mental math practice, as well as a Discord community where students can engage and practice together. The importance of practice is stressed to fully leverage the power of Chisanbop for rapid mental math.

Keywords

💡Kung Fu Mathematics

Kung Fu Mathematics refers to the rapid and efficient way of performing addition and subtraction using fingers as an abacus. The term 'Kung Fu' is used metaphorically to describe the quick, almost martial-arts-like speed and precision of these calculations. The method, as demonstrated in the video, allows students to compute sums with their hands, which gives the impression that they're performing fast, complex calculations with ease.

💡Chisanbop

Chisanbop is the specific mathematical technique highlighted in the video. It involves using fingers to represent numbers for addition and subtraction. Originating from South Korea, it enables fast calculations by mapping numbers onto the fingers, which act as a simple abacus. This method is presented as a way to ease the cognitive load by allowing the brain to rest while the hands perform the counting and calculations.

💡Finger Abacus

The Finger Abacus is a core element of the Chisanbop method, where each finger represents a number between 1 and 9. By moving and positioning fingers, one can represent values up to 99, and with additional techniques, even higher. The concept helps break down long arithmetic problems into manageable steps, reducing the need for mental computation and relying instead on physical finger movements.

💡Mental Math

Mental Math refers to performing arithmetic calculations without the use of external tools like calculators or paper. In the context of the video, mental math is augmented by the Chisanbop technique, which leverages physical finger movements to aid in rapid calculation, freeing the brain from constantly tracking sums and differences. The video's aim is to teach viewers to use this method for fast and efficient mental math.

💡Speedwrite

Speedwrite is the sponsor of the video, mentioned as a tool that helps students meet assignment deadlines by rewriting text through AI. The tool can generate unique content from existing text, allowing users to save time on repetitive assignments. Though unrelated to the core topic of math, Speedwrite is highlighted as a helpful AI tool for students in completing academic tasks.

💡Representation of Numbers

In Chisanbop, the representation of numbers on the hands is crucial. The right hand represents numbers from 1 to 9, while the left hand represents multiples of ten (10, 20, 30, etc.). This system allows users to represent numbers up to 99 using both hands. The video emphasizes learning how to quickly switch between these representations to perform fast calculations.

💡Addition Using Chisanbop

The video teaches how to perform addition using the Chisanbop technique. By representing numbers on the fingers, users can quickly add numbers like 73 and 25 by first representing 73, then adding 20 and 5 using specific finger movements. This method allows the user to perform the calculation without needing to mentally track the intermediate sums, relying instead on the finger positions.

💡Subtraction Using Chisanbop

Subtraction in Chisanbop involves closing fingers to 'subtract' numbers. For example, to subtract 32 from 54, one would first represent 54, then close fingers to subtract 30, and finally adjust for the remaining 2. The video demonstrates how to perform subtraction efficiently by manipulating finger positions, avoiding the need for mental tracking of partial differences.

💡Limitations of Chisanbop

One limitation of Chisanbop is that it only uses 10 fingers, which restricts the ability to represent numbers beyond 99 without additional techniques. The video addresses this by explaining how to use simple rules like 'add 50 and subtract 30' when more than 10 units need to be represented. These workarounds help users extend the method to higher numbers but require additional practice.

💡Practice and Mastery

The video stresses the importance of practice in mastering Chisanbop. Speed and accuracy in representing numbers and performing calculations depend on muscle memory and finger agility. Through consistent practice, users can perform rapid addition and subtraction, as demonstrated in the video. The creator even challenges viewers to perform larger calculations like adding 482 and 394, showing that mastery of the technique is achievable with dedication.

Highlights

Introduction to fast mental math using fingers as an abacus through the 'Cheesenbop' method.

Kung Fu Mathematics: The method of fast finger-based calculations inspired by Cheesenbop.

Demonstration of finger representations for numbers 1 to 99 using the right and left hand.

Detailed explanation of how to represent the numbers 1 to 9 on the right hand.

How the left hand is used to represent tens (e.g., 10, 20, 30) and how both hands work together to form numbers up to 99.

Using finger methods to quickly switch between numbers, a core aspect of Cheesenbop.

An example of adding 73 and 25 using the Cheesenbop method, showing the benefit of offloading calculations to the hands rather than the brain.

Explanation of how to overcome limitations of only having 10 fingers when working with larger numbers by adding and subtracting values creatively.

Demonstration of solving subtraction problems like 54 minus 32 using the same finger-based approach.

The method for representing numbers greater than 99 and how it applies to calculations involving hundreds.

The process of counting up to 999 using the Cheesenbop method and introducing limitations for numbers beyond 999.

Step-by-step example of adding 68 and 49 with finger representations beyond 100.

A challenge for viewers to add larger numbers (e.g., 482 and 394) using the Cheesenbop method.

Encouragement for viewers to practice the method through the creator's 'Math Blob Run' game.

Promotion of the creator's Discord community for further discussion and practice of fast math techniques.

Transcripts

have you ever seen those videos on the

internet in which students are using

their fingers to solve long addition and

subtraction problems extremely fast so

till the end of this video you will also

be able to solve these kinds of long

addition and subtraction problems by

just using your fingers as an abacus

or in other words let's learn kung fu

mathematics

[Music]

so hello geniuses welcome to this

another video of method genius mental

math series so before starting this

video let me tell you about the sponsors

of this video named speedwrite this is a

really cool tool with which you can save

yourself from the assignment deadlines

these days students get lots and lots of

assignments and sometimes the deadline

is so close that we don't have time to

write an assignment here speed write can

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you can use to do something better than

those useless than redundant assignments

so now let's come back to kung fu

mathematics why i call it kung fu

mathematics is because the students

doing it looks like they are doing kung

fu but originally this method is known

as cheese and pope and the book that i

am using to teach you this method is the

complete book of chison bob by young pi

it uses our fingers in a really

efficient way and with which we can do

phenomenally fast calculations because

in this method our brain rests our brain

has only one job and that is to count

nothing else in other methods like in

left to right and other methods we

always needed to keep track of the

answer we needed to use our memory our

brain was stressing a lot but in this

method our brain is mostly relaxed and

our fingers are doing most of the work

so the most crucial part of this method

is being able to represent numbers on

your hands and the faster you can switch

from one number to another number and

there are some rules the faster you can

apply those rules the faster you will

calculate so this one will take a little

bit of practice but after practicing you

can do phenomenally fast calculation

really is the end it is not that tough

so now at first let's learn how to

represent numbers from 1 to 99 on your

hands

our right hand represents numbers from 1

to 9 it is like this so this is 1

this is 2 this is 3 this is 4 simple but

now this is not 5 this is 5 okay this is

5 and this is 6 this is 7 this is 8 and

this is 9 so from 1 to 9 in here and

this is 10

20

30

40 and this is 50 60 70 80 and 90.

now we have the representation now we

can represent any number from 1 to 99 on

our hands so let's take an example let

us represent 12 on our hand so see this

is 10 and we need 2 this is 12 now let

us represent 28 so 20 and 5 6 7 8 this

is 28 so now try representing 36 on your

hand

so this is 10 20 30 and 6 5 and 6 so

this is 36 now this looks pretty simple

how simple is this but this is really

really powerful now try to represent

these numbers quickly on your hand as

fast as you can switch from one number

to another number now what you have

learned is the essence of chase and bob

or kung fu mathematics now with this you

can do any addition problem whose answer

is less than 99 on your hands using

cheese and bob so let us take an example

we need to add 73 and 25 now firstly you

can also use left to right method and

this is a really easy problem if you

have seen my previous all videos there

are tons of ways you can do it but now

we will use our fingers to do it so

first represent 73 how 50 60 70 now 373

now represent 25 so we have 20 in here

so 10 20 20 and

5

5 so what is this this whole is 90 and

this is 5 6 7 8

98 is our answer so right now i was

explaining this but in reality if you do

it you just need to hear someone saying

like 70

3

and add 25

and at the end count this is 90 this is

5 6 7 8 so 98 so in here our mind is

resting you can see it by using the left

to right method there our mind is doing

all the work but in here our hands are

doing the most of work that's why the

students are able to add long strings of

numbers because every time they add it

they don't need to keep track of the

answer their hands have the answer and

in that answer they're adding further

and then further and by doing this they

are doing that fast calculation so now

there is a little limitation in our

hands the previous question that i have

taken is specially designed not to

include that limitation but let us take

this question 32 plus 28 so let's first

represent 32 so here's 30 and 2 32 now

we need to add 28 to it now how would we

do it see in here i have just 10.

so there is no 20 in here then what

would i do in here you need to be

creative with cheese and bob by practice

this will come automatic so in here we

need to add 20 we don't have fingers for

20. what can we do is this we can add 50

and subtract 30 so we have 50 so c30

plus 20 is basically 50

now 28 for it we also don't have fingers

so what we can do is this we can add 10

and subtract

2. so what we have in here 50 60 60 is

our answer so in chisholm because we

have only 10 fingers we have this

limitation which we can overcome by

knowing these simple rules these are

like really simple rules like you don't

need to memorize them for example let's

say you have this finger opened already

and now you want to represent 9 in here

how would you do it it's simple using

this equation add 10 and subtract one

the only thing that you need is the

practice on your hands to do it even

faster

now let's take a subtraction problem

with cheese and pop 54 minus 32 try to

do it yourself how would we do this see

54. okay 54 minus 32

now in here what we have this we need to

subtract 30 first so what we can do is

this we can first subtract

50

and then add

20 so this should be very quick

20 and 2 we need to subtract 2 but we

have in here 22 so this is how easy

cheese and bob is so in reality this

should be this quick like someone saying

to you you need to do this he's saying

50

4

minus he said minus 10 like prepare your

brain that he's saying minus and he said

30 and quickly 30

and 2 we need to like subtract 2 not

open it like subtraction is closing it

so what we have then 22 say it quickly

so like you have not taken any time to

solve this problem your hands only just

solved your problem so this is basically

the real power of jason bob okay so now

let's try this long addition problem

like someone telling you 15 plus 12 plus

8 plus 29 and so on how would you do it

so do it with me first represent 15 so

15

now add 12 to it so

12

now in here this is the real thing if

you are doing it otherwise you will need

to keep track of the answer but now we

don't need to keep track of the answer

give us the next number in here so now

add 19 so adding 10 and now for 9 we

don't have fingers so what we can do is

add 10 and subtract 1. now we have the

answer in our hands we don't need to

keep track give us the next number now

add

29 for adding 20 we can add 50 and

subtract 30 and add 9 so adding 10 and

subtracting 1 so we have the answer in

here give us the next number so add 11

10 11 now add 8 in here so if we're

adding 8 we will add 10 and subtract 2.

we can't subtract 2 in here because like

we don't have two fingers up so what we

can do is this we can subtract 5 and

then add 3 so what do we have in here we

have 90 and 4 so 94 is our answer so

this is how we use this and bob to do

those addition kinds of problems now

what you have learned is almost all the

cheese and bob that you need to know

now the only thing you need to go beyond

100 is the representation of hundred so

it is pretty simple see this is 10 20 30

40 50 60 70 80 90. 90 and this is 91 92

93 94 95 96 97 98.99 so we have 99. now

if you want to represent 100 then what

do we do is this like we close

everything like we are going the next

level so closing everything and use your

right hand because it was in 99 now if

you like hold your hand like this now

this is representing 100 and your this

this finger should be like this so this

is 400 now how you read it you first

read write then read left and then read

right so this is basically 100 this is

zero and this is also zero because no

other finger is open so this is

representing 100 now this this is

representing 200 this like half open

this is representing 300 400 now 500 600

700 800 and 900 so this is basically the

same thing just half open fingers and

hand like this represent that you are in

hundreds okay now try representing 153

on your hands so now let's represent 153

so this is 100 and this is 50 now

representing three so now for

representing three this finger is

representing hundred we also need to

represent one with it what do we do we

half open it and then full open the

other two fingers so this is

representing basically like this this is

hundred

fifty and this

three because this now half open this is

not like this this is like this so now

you can see as we are going further our

hands are getting a little bit messier

and this is why i will teach you to only

count till 999

because after that our hands get a lot

load messier and mathematics goes

somewhere like this and it is only kung

fu which is left so we will count till

999 now let's do a simple addition

problem with this method so add 68 and

49 with cheese and bob so first let's

represent 68 so 50 60 and 5678

68 now we need to add 40 into it how

would we do it because we have just

three fingers left in here so what we

can do is this we can add 100 and like

close this half a hundred and then we

can subtract 60 so we have added 40 now

we need to add a 9 for adding 9 we can

like add our 10 and subtract 1 like

subtracting 1 and this finger like half

open so what we have in here see 100

this is representing 10 and this is 5 6

7 so how much

117 is our answer so this is how

basically we can do problems beyond 100

using json bob so now finally try

representing these numbers on your hands

as swiftly as you can and if you can do

it i have a challenge for you you can

try doing this problem add

482 and

394 using cheese and fob and if you can

do it then congratulations you are a

master at jason pope so just a fact in

reality we can represent efficiently

numbers till

9999 on our hands this is the power of

cheese and bob but i'm not teaching it

because this was already messier and

that is more more messier but if you

want to learn it you can learn it from

this book and as i always say you need

to practice it and if you watch my

previous video i have said it many times

for practicing i have made a game known

as math blob run in which there is a

good blob and bad blob the bad blow

wants to eat our good blob but solving

mental math questions will save your

blob so you can use that game to

practice cheese and bob too and also do

not forget to join us on our discord

server there we are making a really good

maths community and finally thanks for

watching this video i hope you have

enjoyed and always remember that math is

everything