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Subtraction Strategies

Zero Facts

When you subtract 0 from any number, the difference is always the number you started with.     9 - 0 = 9
 

Take All

Any number minus itself is always 0.    7 - 7 = 0

Use Double Facts (Take Half)

You can recognize double facts in subtraction problems.
16 - 8 = ? Think... 8 + 8 = 16  

Use Make 10 Facts

Use addition combinations of 10 to solve subtraction problems from 10.
10 - 6 = ? Think...  6 + ? = 10  
 

Count Back

When subtracting 1 or 2, you can count back.
8 - 2 = ?  Count back...8, 7, 6  

Use Addition

You can think about a subtraction problem in terms of addition.
8 - 5 = ? Think...  5 + ? = 8  

Neighbor Facts

The difference between two numbers that live next door to each other is always 1.    10 - 9 = 1         6 - 5 = 1
 

Up to 10 and More Facts

Add to the smaller number to make ten. Then add more to reach the larger number. The total amount you add is the difference.
15 - 8= ? Think...  8 + 2 = 10, 10 + 5 = 15  2 + 5 = 7           Therefore...15 - 8 = 7

Games to Practice Subtraction Facts