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一、估算法。解题后对结果作个估计,看是不是符合题意和实际。例如:人数只能是整数,部分数只能小于总数(女同学的人数只能小于全班人数等);速度、亩产量、工作效率等数据都要符合实际。发现错误,要及时纠正。
First, the estimation method. Solve the problem after making an estimate to see if it is in line with the questions and the actual. For example: the number of people can only be an integer, the number of parts can only be less than the total number (the number of female students can only be less than the entire class); speed, output per mu, work efficiency and other data should be realistic. Found errors, to promptly correct.