1
Fact family for {4, 16, 20}: Write all 4 equations =
2
Fact family for {13, 18, 31}: Write all 4 equations =
3
Fact family for {15, 3, 18}: Write all 4 equations =
4
Fact family for {6, 19, 25}: Write all 4 equations =
5
Fact family for {15, 2, 17}: Write all 4 equations =
6
Fact family for {12, 6, 18}: Write all 4 equations =