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Using Related Facts
Fact Families
Using Addition to Subtract
Subtraction Facts
Addition Review
100
What is the related subtraction fact for 8+9=17?
17-8=9
100
What are the related subtraction facts for 8+4=12 and 4+8=12?
12-4=8 12-8=4
100
What is the whole in the problem 10-7=3?
The whole is 10...(10 is the biggest number).
100
When you're trying to solve 15-7, are you trying to find the whole or the part?
The part.
100
What is 7+7?
7+7=14
200
What is the related addition fact for 12-6=6?
6+6=12
200
What are the related addition facts for 15-6=9 and 15-9=6?
9+6=15 6+9=15
200
What is the whole in 15-9=6?
The whole is 15....(15 is the biggest number).
200
Why is it helpful to think addition when you are trying to subtract?
Addition makes it easier to find the missing part.
200
What is 9+9=18?
9+9=18
300
What is the related addition fact for 11-5=6?
6+5=11
300
What is the complete fact family for 6+7=13?
7+6=13 13-6=7 13-7=6
300
What is the part you know in the subtraction problem 9-?=4?
The part you know is 4.
300
How could you rewrite 15-7 as an addition problem with a missing number?
7+__=15
300
What is 5+6? Is it a doubles plus one or a doubles plus two?
5+6=11...it is a double plus 2 problem.
400
What is a related subtraction fact for 12+6=18?
18-12=6
400
Write a complete fact family.
Answers may vary.
400
What is the part you don't know in 8-?=5?
The part you don't know is 3.
400
What is missing from the addition problem 7+ __=15...a part or the whole?
The part is missing (8).
400
How do you use the doubles plus two strategy to solve 8+9?
You find the number in the middle (7) and double it. The answer is 14.
500
What is a related subtraction fact for 35+25=60?
60-35=25
500
What is the complete fact family for 13+18=31?
18+13=31 31-18=13 31-13=18
500
How can you use addition to help you subtract 11-7=?
You can use a related addition fact...7+?=11.
500
Rewrite this subtraction problem as an addition problem to help you solve. 12-7=___
7+___=12 (5)
500
What is the sum of 6+7?
The sum is 13.