Basic Addition and Subtraction Problems

This video tutorial by Ben Mahi from Yami Chess introduces a math learning aid based on chess. The lesson covers adding and subtracting two-digit numbers, emphasizing the importance of understanding place value. Through examples, the video demonstrates how to handle cases where the sum or difference involves carrying or borrowing. The tutorial concludes with practice problems for viewers to solve.

What is the place value of the digit '3' in the number 13?

• Thousands

• Hundreds

• Tens

• Ones

In the number 20, how many tens are there?

• 0

• 2

• 1

• 3

When adding 12 and 15, what is the sum of the ones digits?

• 8

• 5

• 6

• 7

What is the result of adding 24 and 61?

• 95

• 105

• 85

• 75

When adding 42 and 38, what do you do with the sum of the ones digits?

• Ignore the tens digit

• Write both digits

• Write the ones digit and carry the tens

• Write the tens digit

What is the sum of 73 and 19?

• 93

• 92

• 91

• 82

When subtracting 61 from 21, what is the result of the ones digits?

• 0

• 2

• 1

• 3

What is the result of subtracting 39 from 17?

• 42

• 32

• 22

• 12

When subtracting 84 from 45, what must you do with the ones digits?

• Subtract directly

• Borrow from the tens place

• Add 10 to the top digit

• Ignore the tens digit

What is the result of subtracting 98 from 59?

• 29

• 39

• 59

• 49