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Look at the ten-frames.Write an addition fact with 5.Then write an addition fact for 10.

Look at the ten-frames.Write an addition fact with 5.Then write an addition fact for 10.

You can use a ten-frame to show an addition fact with 5.

5 and 3 more is 8. The ten-frame shows another addition fact.You have 8. Make 10.

8 plus 2 more is 10.

5 1 3 5 ?

5 1 3 5 8

There are 8 counters in the ten-frame.

Start with 5. Then add 3

more.

Do you understand? How does a ten-frame help you add 5 1 4?

5 1 ____ 5 72____ 1 ____ 5 103

1. 2.

3. 4.

5 1 ____ 5 ____

____ 1 ____ 5 10

5 1 ____ 5 ____

____ 1 ____ 5 10

5 1 ____ 5 ____

____ 1 ____ 5 10

7

Algebra Write the missing number. 9. 10.8 1 ____ 5 10 6 1 ____ 5 10

5. 6.

7. 8.

5 1 ____ 5 ________ 1 ____ 5 10

5 1 ____ 5 ________ 1 ____ 5 10

5 1 ____ 5 ________ 1 ____ 5 10

another addition fact.2 boxes

are empty. Add 2.

8 1 2 5 10

5 1 ____ 5 ________ 1 ____ 5 10

130 one hundred thirty one hundred thirty-one 131

MTH12_SE01_CCSS_TPC04_L04.indd 2 04/04/11 8:52 AM

Guided PracticeGuided PracticeGuided Practice

Look at the ten-frames.Write an addition fact with 5.Then write an addition fact for 10.

5 1 ____ 5 72

1. 2.

5

1

2

3

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50

Set A, pages 28–30

Add 155 1 83. Use mental math.

Use the breaking apart method. Adding 5 to 155 is easy.

Break apart 83 into 5 and 78.

155 1 5 5 160

160 1 78 5 238

So, 155 1 83 5 238.

Remember that when you use compensation, you must adjust the sum or difference.

1. 53 1 88 2. 372 1 226

3. 5,342 1 1,826 4. 283 2 169

5. 676 2 521 6. 1,089 2 961

Set B, pages 32–33

Estimate 1,579 + 1,248

Round each number to the nearest hundred.

1,579 rounds to 1,600.

1,248 rounds to 1,200.

Add 1,600 + 1,200

2,800

Remember you can round numbers to the nearest hundred or thousand when estimating sums and differences.

1. 473 1 465 2. 8,352 2 3,421

3. 586 2 483 4. 4,094 1 246

5. 1,440 2 933 6. 748 2 392

7. 981 1 193 8. 725 1 635

Set C, pages 34–35

The standard weight of a penny is 2.50 grams, a standard nickel is 5.0 grams, and a standard half dollar is 11.34 grams. Estimate how much greater the weight of a half dollar is than a nickel.

Use subtraction to solve.

11.34 rounds to 11. 11.0 2 5.0 5 6.0

The half dollar is about 6.0 grams heavier.

The weight of a penny was extra information.

Remember some problems do not have enough information to solve.

1. Todd read 35 pages of his book on Saturday. He read for 10 minutes on Sunday. How many pages did Todd read over the weekend?

2. Molly bought 150 sheets of paper. She put 50 sheets in her math folder, 25 sheets in her science folder, 25 sheets in her social studies folder, and 40 sheets in her reading folder. How many sheets did Molly have left?

TCAP Reteaching

MTH09_STATE_SE4_050-051.indd 50 3/6/10 7:41:21 PM

Remember Remember compensation, you must adjust the sum or difference.

53

5,342

676

TCAP Reteaching

676 2 521 6. 1,089 2 961

Remember Remember compensation, you must adjust the sum or difference.

1 88

5,342 1 1,826 4. 283 2 169

676 521 6. 1,089 961

compensation, you must adjust the sum or difference.

1,826 4. 283

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