X. Fact Families: Group C
- 9 + 1 =
10 − 9 =
10 − = 9
1 + 9 = - 7 + 3 =
3 + = 10
10 − = 3
10 − = 7 - 9 − 2 =
9 − = 2
7 + = 9
2 + 7 = - 10 − 4 =
10 − 6 =
6 + = 10
4 + 6 = - 10 = 5 +
10 − 5 = - = 3 + 6
6 + 3 =
9 − = 3
− 3 =