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Name
6-12
Decide if you need to ungroup. If you need to ungroup,
draw a magnifying glass around the top number. Then
find the answer. Children’s ungroupings may vary.
12
8 2 11
2 10
1.
630
318
__
312
2.
Ungroup to get 10 ones?
Yes
Ungroup to get 10 ones?
Yes
Ungroup to get 10 tens?
No
Ungroup to get 10 tens?
Yes
3 10
© Houghton Mifflin Harcourt Publishing Company
3.
931
845
__
86
4.
407
274
__
133
498
276
__
222
Ungroup to get 10 ones?
No
Ungroup to get 10 ones?
No
Ungroup to get 10 tens?
Yes
Ungroup to get 10 tens?
No
5. Jamal has 590 craft sticks. He
uses 413 craft sticks to make a
building. How many craft sticks
does he have left?
177
craft sticks
label
UNIT 6 LESSON 12
6. On Saturday, 290 people go to the
roller skating rink. 184 of them are
adults. How many are children?
106
children
label
Practice Ungrouping
179
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