My Homework Lesson 1

Name

Number and Operations in Base Ten 2.NBT.7

My Homework

Lesson 1

Make a Hundred to Add

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You can make a hundred to add.

Find 197 + 29. Take apart 29 to make 26 + 3. Then add 197 and 3 to make 200.

Helpful Hint

Take apart a number to make a hundred.

Then add.

197 + 29

197 + 3 + 26 200 + 26 = 226

So, 197 + 29 = 226.

Practice

Make a hundred to add.

1. 23 + 398

2. 178 + 98

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+

+ 398

+

+ 98

21 +

=

176 +

=

So, 23 + 398 =

.

So, 178 + 98 =

.

Chapter 6 ? Lesson 1 355

Make a hundred to add. 3. 77 + 196

4. 245 + 99

+

+ 196

+

+ 99

73 +

=

244 +

=

So, 77 + 196 =

.

So, 245 + 99 =

.

5. 197 people ride the bus in the morning. 74 people ride the bus in the evening. How many people ride the bus in all?

NLeesxstosnto2p! ,

people

Test Practice

6. How could you take apart 128 to solve this addition number sentence?

128 + 94 =

108 + 20

100 + 28

122 + 6

120 + 8

Copyright ? The McGraw-Hill Companies, Inc. John A. Rizzo/Photodisc/Getty Images

356

Math at Home Ask your child to solve 99 + 598 by taking apart an addend.

Chapter 6 ? Lesson 1

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