Doing math problems without making a draft is conducive to the exercise of thinking, which can cultivate our spatial imagination thinking and improve our thinking sensitivity. However, when we do math problems, we must make sure that our notes are clean and tidy.

If you agree with my answer, please adopt it in time.

~ If you agree with my answer, please click the button "Adopt as Satisfied Answer" in time.

~ ~ friends who ask questions on mobile phones can only be satisfied with the evaluation points in the upper right corner of the client.

~ Your adoption is my motivation.

~~O(∩_∩)O, remember to praise and adopt and help each other.