K. Subtraction: Using Doubles Again
Do these problems in your head. Write only the answers.
- 16 − 8 =
- 17 − 8 =
- 15 − 8 =
- 18 − 9 =
- 18 − 10 =
- 15 − 7 =
- 8 − 4 =
- 7 − 4 =
- 60 − 30 =
- Explain your strategy for solving Question D.
Do these problems in your head. Write only the answers.