Multi-Part Lesson
Name
PART
A
6-2
B
C
Regroup Tens
Get Ready
Find 375 + 462.
Main Idea
Step 1 Add the ones.
I will regroup tens
to add three-digit
numbers.
C06-012A-112053.ai
Step 2 Add the tens. If there are 10 or
more tens, regroup 10 tens as 1 hundred.
Write the 1 in the hundreds column.
Step 3 Add the hundreds.
hundreds tens ones
1
3
4
+
7
6
3
Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
C06-013A-112053.ai
5
2
7
C06-014A-112053.ai
375 + 462 =
8
837
C06-008A-112053-K.ai
Check
Use base-ten blocks and WorkMat 7. Add.
1.
2.
6
4.
2
8
How is regrouping ones different from
regrouping tens?
Chapter 6 • Lesson 2C
271_272_CH06_L2C_112053.indd 271
3.
two hundred seventy-one
271
7/19/09 7:23:38 PM
Practice
Use base-ten blocks and WorkMat 7. Add.
5.
6.
7.
8.
9.
10.
11.
263
+ 581
12.
586
+
1
13.
724
+ 124
14.
446
+ 60
15.
352
+ 475
16.
382
+ 51
17.
609
+ 391
18.
559
+ 300
Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
At the Florida Strawberry Festival, you
can eat a lot of different kinds of food
made from strawberries.
19. Look at the list below. How many
shortcakes and milkshakes were
bought?
strawberry shortcake
strawberry cobbler
strawberry milkshake
+
272
52
336
=
two hundred seventy-two
271_272_CH06_L2C_112053.indd 272
271
Math at Home Activity: Ask your child to add 199 + 230
and explain how he or she regrouped.
7/19/09 7:23:47 PM