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UNIT 7
CHAPTER 27
Lesson 27-1
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CHAPTER 27 ADDITION AND SUBTRACTION TO 20
Lesson 27-1 HANDS ON/ALGEBRA: Patterns with 10
Patterns with 10
Name ___________________________
Number patterns can help you add.
Show 10. Show 3 more. What is the sum?
Add. Look for a pattern. Use
and
.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Look at Exercises 15.
What pattern do you see?
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