What is the name for facts in subtraction problems

The name for facts in subtraction problems: Fact Family is a group of math facts that uses the same numbers, for addition, and subtraction.

> I believe is, Subtraction Fact Strategies, or Fact Families.

1. ). Strategy: ===> Think Addition:

1.). Subtraction Description > Using the known addition fact to solve the subtraction problem. Ex. 13-5, think what goes with 5 to make 13?

2.). Strategy: ===> Fact Families

2.). Subtraction Description > Think of the fact family to recall the missing number.

3.). Strategy ===> Build Up Through

3.). Subtraction Description ===> Ten Used when either the subtrahend or minuend is 8 or 9. Ex: 14-9: start with 9 and work up through 10: 9 and 1 is 10 and 4 more makes 5.

4.). Strategy ==> Back Down Through Ten

4.). Subtraction Description: ==> Working backward with 10 as a “bridge”. Ex. 15-6, Take 5 away from 15 to get to ten. Then take one more away, leaving 9.

Hope that helps!!! : )

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

step-by-step explanation:

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