Created from Youtube video: https://www.youtube.com/watch?v=3zXXFwHqlhgvideo

Concepts covered:subtraction trick, two-digit numbers, nearest multiple of 10, adding same amount, efficient technique

Learn an easy subtraction trick to quickly subtract two-digit numbers by finding the nearest multiple of 10 and adding or subtracting the same amount from both numbers, resulting in the same difference. Practice with examples like 65 minus 29, 86 minus 17, and 150 minus 38 to master this efficient technique.

Table of Contents1.Subtraction Trick for Two-Digit Numbers2.Mathematical Concept of Nearest Multiple of 103.Mathematical Calculation of Differences4.Effortless Subtraction Trick Mastery

chapter

1

Subtraction Trick for Two-Digit Numbers

Concepts covered:subtraction trick, two-digit numbers, quick calculation, nearest multiple of 10, adding 1

Learn a quick subtraction trick to subtract two-digit numbers by finding the nearest multiple of 10 and adding 1 to both numbers, allowing you to calculate in just five seconds.

Question 1

What is the nearest multiple of 10 to 29?

Question 2

What is 66 minus 30?

Question 3

Why does adding the same number to both terms not change the difference?

chapter

2

Mathematical Concept of Nearest Multiple of 10

Concepts covered:Nearest multiple of 10, Mathematical concept, Adding and subtracting, Number operations, Consistent difference

Explains the concept of finding the nearest multiple of 10 using the example of numbers like 17, 20, and 86. Demonstrates how adding or subtracting the same amount from two numbers results in the same difference between them.

Question 4

What is the nearest multiple of 10 to 17?

Question 5

What is 89 minus 20?

Question 6

What is 86 plus 3?

chapter

3

Mathematical Calculation of Differences

Concepts covered:Mathematical calculation, Difference between numbers, Rounding to nearest multiple of 10, Addition and subtraction, Examples with numbers

The chapter explains a method for finding the difference between numbers by rounding to the nearest multiple of 10 and then adding or subtracting the difference. It demonstrates this process with examples using numbers like 46, 65, 134, and 291.

Question 7

What is 95 minus the nearest multiple of 10 to 46?

Question 8

What is the nearest multiple of 10 to 46?

Question 9

What is 134 plus the difference between 70 and 65?

chapter

4

Effortless Subtraction Trick Mastery

Concepts covered:Subtraction trick, Mental math, Nearest multiple of 10, Easy subtraction, Quick calculation

Master the easy subtraction trick by quickly finding the nearest multiple of 10 and adjusting the numbers accordingly, making mental math a breeze. Practice with provided examples and test your skills by solving subtraction problems effortlessly in just five seconds.

Question 10

What is 85 minus 39 using the trick?

Question 11

What is 150 minus 38 using the trick?

Question 12

What is 52 minus 28 using the trick?

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