Understanding Expanded Form in Subtraction

The video tutorial explains subtraction to 100 using expanded form. It begins by introducing the concept of expanded form to understand the value of digits in numbers. The tutorial provides examples of subtraction without regrouping, such as 87 minus 35, and with regrouping, like 63 minus 28. The video emphasizes the importance of understanding this strategy, even though it is not typically used to solve equations. The tutorial concludes by highlighting the value of mastering this approach as a foundation for learning other strategies.

What is the purpose of using expanded form in subtraction?

• To make addition easier

• To avoid using calculators

• To understand the value of digits

• To make subtraction faster

In expanded form, how would you express the number 87?

• 80 + 7

• 70 + 8

• 85 + 2

• 90 - 3

What is the first step in subtracting numbers using expanded form?

• Subtract the tens

• Add the numbers

• Subtract the ones

• Multiply the numbers

After subtracting the tens in 87 - 35, what is the result?

• 70

• 40

• 50

• 60

What is the result of 87 - 35 when using expanded form?

• 54

• 53

• 52

• 55

Why is regrouping necessary in subtraction?

• To make subtraction faster

• When the top digit is smaller than the bottom digit

• To avoid using calculators

• To make addition easier

In the example 63 - 28, what is the expanded form of 63?

• 60 + 3

• 50 + 13

• 65 - 2

• 70 - 7

What is the result of subtracting the tens in 63 - 28?

• 30

• 40

• 50

• 60

What do you do when you cannot subtract the ones in a subtraction problem?

• Multiply the numbers

• Skip the subtraction

• Regroup by borrowing from the tens

• Add more ones

After regrouping in 63 - 28, how many ones do you have?

• 12

• 11

• 13

• 10