The problem of the third grade math water meter is calculated as follows: this month's water (electricity) consumption = this month's reading-last month's reading. As follows:

Original question: The readings of water meters in a school are as follows (unit: tons): 362 at the end of March, 439 at the end of April, 55 1 at the end of May, 670 at the end of June, 7 12 at the end of July and 720 at the end of August. What is the water consumption of this school in April and May?

Answer: Water consumption in April = table number at the end of April-table number at the end of March, 439-362=77 (tons). Water consumption in May = table number at the end of April-table number at the end of April, 551-439 =112 (ton). That is, the water consumption in April is 77 tons, and that in May is 1 12 tons.

How to learn mathematics in the third grade of primary school?

Be sure to listen carefully in class, ear to ear, eye to eye, hand to hand. You must learn to take notes. If the teacher speaks very fast in class, he must calm down and listen, don't take notes, and then write them in the notebook after class to maintain high efficiency. Be sure to learn and understand every problem you encounter. Don't be embarrassed to ask, learn to draw inferences from others, that is, use them flexibly.

Don't ask too many questions, but be precise. There should be a set of wrong questions, write down the good questions you usually encounter, write down the wrong questions, read more and think more, and don't stumble in the same place.