8×9=72 trees

2. Each person makes 6 small red flowers, one * * *, and how many do four people make?

6×4=24 flowers

3. Xiaoguang's father bought 24 apples and his mother bought 16 apples. Put these apples on five plates evenly. How many apples do you put in each plate?

(24+ 16)÷5=6