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UNIT 3
CHAPTER 10
Lesson 10-1
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CHAPTER 10 SUBTRACTION STRATEGIES
Lesson 10-1 Count Back 1 or 2
Count Back 1 or 2
Name ___________________________
Math Words
count back
number line
You can
count back
to subtract.
Use a
number line
.
Use the number line.
Count back to subtract.
1.
2.
3.
4.
5.
How does using a number line help you subtract 10 - 1?
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