Question

Marco picked up 9 rocks. He picked up 2 of them on his way to school. He picked up the rest on his way home. How many rocks did Marco pick up on his way home?

Answer 1

7.

Explanation:

If Marcus picked up 9 rocks, and 2 were on his way to school, that means that the rest were left for the way home. So, you can use the equation `9-2` to figure out how many were picked up while walking home. Since `9-2=7`, you know that `7` rocks were picked up on the way home.