1. Now we are going to plant trees. If only willow saplings are planted, how many trees can each group plant?

30÷5=6 (tree)

2. How many pine seedlings are there than willow seedlings?

48-30= 18 (tree)

Let's plant trees now. If only pine seedlings are planted and each group plants a bundle, how many pine seedlings are left?

(48÷8-5)×8=8 (tree)