M. More Mental Arithmetic
Solve these problems without paper and pencil. You may use a number line or mental math. Write down the answers. Explain how you found your answers.
- 8 + 100 =
- 8 + 99 =
- 8 + 499 =
= 7 + 8
= 7 + 18
= 7 + 48
- Explain how solving Question A can help you solve Question B.