In this question, it is necessary to judge whether Xiaoli and Xiaoxue have jumped 90 times each. First of all, according to the information given in the title, Xiaoli and Xiaoxue jumped 180 times. According to this information, we can infer how many times Xiaoli and Xiaoxue jumped.
According to the topic information, Xiaoli and Xiaoxue jumped 180 times. If we assume that Xiaoli and Xiaoxue jumped 90 times each, then we can simply calculate whether the information meets the topic. If Xiaoli and Xiaoxue jump 90 times each, then they jump 180 times, which is just in line with the information given in the title. We come to the conclusion that Xiaoli and Xiaoxue jump 90 times each, which is correct.
The expansion of primary school students' problem-solving methods;
1, good at summing up laws.
In primary school, many topics have certain rules to follow. Therefore, you should be good at summing up the rules when you do the questions. For example, when doing math problems, we can summarize some simple calculation laws through observation and induction, such as the commutative law of addition and subtraction, the associative law and so on.
Step 2 infer from each other
In primary school, many topics are variations or combinations of basic topics. Therefore, when doing the questions, you should learn to draw inferences and try to deform or combine the questions as much as possible, so that you can better understand the questions. For example, when doing math application problems, we can change the problems by exchanging conditions and problems and increasing or decreasing conditions.
Step 3 make good use of tools
You can use some tools to help you understand and answer questions better. For example, you can use a calculator to calculate values quickly, or use drawing tools to help you understand questions better.
Step 4 pay attention to details
Pay attention to details when doing problems. For example, writing a composition should pay attention to grammar and spelling mistakes, and doing math problems should pay attention to details such as units and symbols.
5. Preventive measures
Look at the requirements of the topic clearly, don't do it in a hurry, understand the meaning of the topic first. Find out the key words and data in the topic and draw them with strokes. For longer topics, you can read and understand paragraph by paragraph.