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UNIT 7
CHAPTER 27
Lesson 27-4
 
 
 
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CHAPTER 27 ADDITION AND SUBTRACTION TO 20
Lesson 27-4 ALGEBRA Use Addition to Subtract
 
 

  
Use Addition to Subtract
  
Name ___________________________

Math Word  
related facts

 You can use a related addition fact to help you subtract.




and are related facts.





 Find each missing number.

1.
2.
3.
4.
5.
6.
7.
8. Why is each pair of facts in Exercises 1–7 called related facts?


 

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