1
Fact family for {1, 4, 5}: Write all 4 equations =
2
Fact family for {10, 5, 15}: Write all 4 equations =
3
Fact family for {1, 5, 6}: Write all 4 equations =
4
Fact family for {2, 1, 3}: Write all 4 equations =
5
Fact family for {1, 8, 9}: Write all 4 equations =
6
Fact family for {9, 4, 13}: Write all 4 equations =