Adjusting Numbers in Addition

The video tutorial explores various strategies for adding numbers using examples from Khan Academy exercises. It demonstrates how to simplify addition by adjusting numbers to make calculations easier. The tutorial covers three examples: adding 78 and 9, 35 and 15, and 41 and 52, showing different methods to achieve the same result. These strategies include breaking numbers into parts, adjusting numbers to round figures, and using mental math techniques to simplify calculations.

What is the main focus of the video tutorial?

• Multiplication techniques

• Subtraction methods

• Addition strategies

• Division shortcuts

Which strategy can be used to simplify adding 78 and 9?

• Subtract 2 from both numbers

• Add 2 to both numbers

• Add 1 to 78 and subtract 1 from 9

• Subtract 1 from 78 and add 1 to 9

Why is the strategy of adjusting numbers useful?

• It creates round numbers that are easier to add

• It changes the sum

• It makes the numbers smaller

• It makes the numbers larger

How can 35 plus 15 be simplified?

• Add 35 and 5, then add 10

• Add 35 and 20

• Add 30 and 15

• Add 40 and 10

What is the result of breaking down 15 into 5 and 10 when adding to 35?

• 40

• 45

• 50

• 55

What is the benefit of adjusting both numbers in an addition problem?

• It makes the numbers equal

• It changes the sum

• It simplifies the addition process

• It makes the numbers more complex

How can 41 plus 52 be simplified?

• Add 41 and 50, then add 2

• Add 40 and 52, then add 1

• Add 40 and 50, then add 3

• Add 43 and 50

What is the result of adjusting 41 to 43 and 52 to 50?

• 91

• 90

• 93

• 92

Why is it useful to turn 52 into a round number like 50?

• It makes division easier

• It makes addition easier

• It makes multiplication easier

• It makes subtraction easier

What is the final sum of 41 plus 52 using the adjustment strategy?

• 91

• 94

• 92

• 93