Name
Chapter 25, Lesson 2
Reteach
Date
Hands On: Regroup in Division
CA Standards
NS 2.5, MR 2.3
Find 51 ÷ 3.
Step 1 Use base-ten
blocks to show
51.
Step 2 Divide the tens
into 3 equal
groups.
Step 4 Divide the 21
ones into 3
equal groups.
Step 3 Regroup the 2
leftover 10’s as
20 ones.
Solution:
20 ones + 1 one = 21
ones.
There are 3 equal groups
with 1 ten and 7 ones, or
10 + 7 = 17.
So 51 ÷ 3 = 17.
Use blocks to answer each question below.
1.
2.
If the blocks are divided into three
equal groups, how many tens blocks
go into each group?
If the blocks are divided into three
equal groups, how many tens blocks
go into each group?
How many tens blocks are leftover?
How many tens blocks are leftover?
Regroup the remaining tens blocks
and add to the ones blocks. How
many ones blocks are there now?
Regroup the remaining tens blocks
and add to the ones blocks. How
many ones blocks are there now?
How many blocks are in each of the
three equal groups?
How many blocks are in each of the
three equal groups?
Writing Math Sylvia wants to divide 64 apples into 4
baskets. Explain how she can model the problem using base-ten
blocks. How many apples will go into each basket?
Reteach
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Use with text pages 544–546.