Fact Families
Write the fact family: 6, 1, 5
1 + 5 = 6
5 + 1 = 6
6 - 1 = 5
6 - 5 = 1
2 + ____ = 5
2 + 3 = 5
3 - 0 = 3
What's my rule?
IN OUT
0 5
10 15
15 20
20 25
The rule is + 5
Write the fact family: 7, 3, 4
3 + 4 = 7
4 + 3 = 7
7- 3 = 4
7 - 4 = 3
5 + ____ = 6
5 + 1 = 6
9 - 1 = ______
9 -1 = 8
6 - 0 = ______
What's my rule?
IN OUT
4 2
7 5
9 7
11 9
The rule is -2
Write the fact family: 9, 3 , 6
3 + 6 = 9
6 + 3 = 9
9 - 3 = 6
9 - 6 = 3
10 + ____ = 12
10 + 2 = 12
15 - 1 = 14
14 - 0 = ______
What's my rule?
IN OUT
10 20
30 40
50 60
90 100
My rule is + 10
Write the fact family: 10, 2 , 8
2 + 8 = 10
8 + 2 = 10
10 - 2 = 8
10 - 8 = 2
8 + 4 = 12
89 - 1 = ______
89 - 1 = 88
87 - 0 = _____
87 - 0 = 87
What's my rule? +3
IN OUT
1
3
6
10
OUT
4
6
9
13
Write the fact family: 15, 5, 10
5 + 10 = 15
10 + 5 = 15
15 - 5 = 10
15 - 10 = 5
9 + _____ = 17
9 + 8 = 17
984 - 1 = _____
984 - 1 = 983
1,000 - 0 = _____
1,000 - 0 = 1,000
What's my rule? + 2
IN OUT
3
8
11
15
IN OUT
3 5
6 8
9 11
15 17