M. Fact Families
Sort Subtraction Flash Cards: Groups 7 and 8 into pairs of facts that belong to the same fact family. Be ready to discuss the strategies you used to make pairs.
- Solve the number sentence and complete the fact family for 15 − 7 =
- _________________________
- _________________________
- _________________________
- Solve the number sentence and complete the fact family for 14 − 6 =
- _________________________
- _________________________
- _________________________
- Solve the number sentence and complete the fact family for 18 − 9 =
- _________________________
- Why is this fact family different from the others?