In the evening, I watched the Olympic puzzle of this book: the apple orchard is three times as big as a pear tree, and Master Lao Wang fertilizes 2050 apples and pears at a time. A few days later, all the pear trees were fertilized, but the remaining 80 apples were not fertilized. Excuse me, how many apples and pears are there? This problem

I'm not intimidated. Asking questions can arouse my interest. In my opinion, a tree is a triple pear tree. If two trees are fertilized on the same day, Master Lao Wang will fertilize "20×3" apple trees and pear trees every day. In fact, he only applies fertilizer once every 50 apples, with a difference of 10, and finally 80, with a total difference, from which we can know that Master Lao Wang has been applying fertilizer for eight days. 20 1 day pear, 8-day pear is 160. According to the first condition, we can know that the apple is 480, which is a good way to solve the problem with the assumption of thought, so I think it is a good way to solve the problem.

1, you can write mathematics used in daily life.

On page 3, you can write down the mathematical phenomena you see and think about mathematical problems.

4. You can write math-related stories.