1. Complete the following mathematical equation: 80 + 20
2. Complete the following mathematical equation: 24 ÷ 4
3. Complete the following mathematical equation: 5 × 7
4. Complete the following word problem and the detail your process in the box below: Sam needs to peel 10 apples for a pie. If he can peel 4 apples in 6 minutes, how long will it take to peel all 10 apples?