Finger Mathematics - How to calculate Faster than a calculator Mental maths - 10
Summary
TLDRThe 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
🧮 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'.
👊 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.
✋ 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.
Mindmap
Keywords
💡Kung Fu Mathematics
💡Chisanbop
💡Finger Abacus
💡Mental Math
💡Speedwrite
💡Representation of Numbers
💡Addition Using Chisanbop
💡Subtraction Using Chisanbop
💡Limitations of Chisanbop
💡Practice and Mastery
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
help let's take a simple example let's
say i have to write an assignment on sun
but i can just copy and paste it from
wikipedia
so what i can do is this i can copy this
to speed write and there speedwrite uses
an ai to rewrite the text given to it in
a completely unique way and every time
you do it it will generate a completely
new text so if wisely used this tool can
help you save a lot of your time which
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
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