Analysis of primary school mathematics cases, first find out the key sentences in the topic, such as "borrowing a book from the library." If you read 35 pages a day, you will return the book late 1 day; If you read 40 pages a day, you will read 5 pages less on the last day; How many days is this book? How many pages are there in this book? "First of all, understand this key sentence: if you read 35 pages a day," you will return the book 1 day late ",which means" if you read 35 pages a day, there are only 35 pages left unread. "

For example, this topic: When Xiao Ming does addition, he regards a 0 with dozens of digits as 6 and another 8 with several digits as 3, and the result is 1054. What is the correct result?

Finding out the problem first is also the key, because the tenth 0 is regarded as 6, which means that the number has increased by 60, and because the 8 in the number is regarded as 3, which means that the number has decreased by 5, so the sum of this number has increased by 60-5=55.

These examples are just the tip of the iceberg. You have to draw inferences yourself. Finding out the key sentences of each application problem is a breakthrough.