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.