Hands On: Subtract 2-Digit Numbers with Regrouping

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If there are not enough ones to subtract, regroup 1 ten as 10 ones. Model the subtraction with and . Step 1. Show 4 tens and 3 ones. Step 2. Regroup 1 ten as 10.
Name

Chapter 11, Lesson 3 Reteach

Date

CA Standards Hands On: Subtract 2-Digit Numbers NS 2.2, MR 2.1 with Regrouping If there are not enough ones to subtract, regroup 1 ten as 10 ones.

and .

Model the subtraction with Step 1

Step 2

Step 3

Show 4 tens and 3 ones.

Regroup 1 ten as 10 ones.

Take away 6 ones.

Tens

Ones

Tens

Ones

Tens

Ones

How many are left? Solution:

3 tens Subtract. Use

and

7 ones

to help.

Show Subtract Do you How What is the greater the smaller need to many tens difference? numbers. number. regroup? and ones are left? 1.

62 - 8 =

Yes

2.

51 - 7 =

3.

tens

ones =

Reteach Copyright © Houghton Mifflin Company. All rights reserved.

tens

No

ones

48 - 19 = tens

ones =

Use with text pages 219–220.