4.5.1-Subtract Whole Numbers

Subtraction with Regrouping

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50-38=

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82-15=

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31-14=

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93-49=

Subtraction with Regrouping

Steps for Subtracting

• Begin in the ones place

• Ask "Can I Subtract?"

• Regroup if necessary

• Subtract

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65 - 24 =

Multiple Choice

In what place should I start subtracting?

• hundreds

• tens

• ones

Multiple Choice

What question should you always ask when subtracting?

• Should I really do this?

• Can I subtract that?

• Does my Mom really love me?

• Will it rain today?

Multiple Choice

What is the answer to a subtraction problem?

• Sum

• Answer

• Subtract

• Difference

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How many ones are there?

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How many tens and ones are there?

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How many more blocks are needed to make 14 ones?

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How many blocks should be taken away to form 5 tens and 7 ones base on the picture?

Multiple Choice

Rearranging place values when you carry in addition or borrow in subtraction is called...

• rounding

• factoring

• comparing

• regrouping

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34 hundreds and 10 tens =

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When we have MORE THAN TEN ones or tens, we need to _?

Multiple Choice

• 42 + 16

• 27 + 12

• 27 + 16

• 36 + 11

Multiple Choice

• 68 - 21

• 78 - 14

• 68 - 14

• 53 - 21

Multiple Choice

• 52 - 2

• 48 - 26

• 52 + 20

• 34 - 20

Multiple Choice

• 78 - 25

• 89 - 25

• 61 - 10

• 78 - 43

Multiple Choice

• 67 - 61

• 88 - 31

• 88 - 61

• 74 - 50

Multiple Choice

• 51 - 20

• 44 - 12

• 35 - 12

• 44 - 23

Multiple Choice

• 94 - 32

• 94 - 63

• 85 - 43

• 86 - 63

Multiple Choice

• 56 - 10

• 31 - 9

• 45 - 22

• 31 - 10

Multiple Choice

First, THINK: "Do I need to REGROUP?"

How do you know?

Show me on your paper BEFORE you answer.

• 379
• 561
• 479
• 473

Multiple Choice

First, THINK: "Do I need to REGROUP?"

How do you know?

Show me on your paper BEFORE you answer.

• 3,887
• 4,113
• 5,177
• 3,787

Multiple Choice

First, THINK: "Do I need to REGROUP?"

How do you know?

Show me on your paper BEFORE you answer.

• 3,347
• 4,659
• 4,457
• 6,659

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First, THINK: "Do I need to REGROUP?"

How do you know?

Show me on your paper BEFORE you answer.

Type the FINAL answer in the blank.

Fill in the Blanks

SolveFirst, THINK: "Do I need to REGROUP?"

How do you know?

Show me on your paper BEFORE you answer.

Type the FINAL answer in the blank.