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Use Numbers to 20

Lesson 1 - Numbers 11 and 12 
Lesson 2 - Numbers 13, 14, and 15 
Lesson 3 - Numbers 16 and 17 
Lesson 4 - Problem-Solving Strategy: Look for a Pattern  
    Lesson 5 - Numbers 18, 19, and 20 
    Lesson 6 - Compare Numbers to 20 
    Lesson 7 - Order Numbers to 20 
    Study Guide and Review  
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