论文部分内容阅读
本单元复习要点是:1.四则混合运算的运算顺序和根据有关运算定律或运算性质调整运算顺序进行简便计算;2.列综合算式解答文字题;3.解答典型应用题——相遇问题;4.解答稍复杂的倍数应用题。一、掌握运算顺序,训练运算技巧通过四则混合运算的复习,一方面要求学生熟悉掌握四则混合运算的顺序;另方面要求能灵活运用运算定律和运算性质进行简便计算,并通过列综合算式解答文字题,训练学生的分析与综合能力。1.对四则混合运算式题,可用“画线法”标出先算什么,再算什么,最后算什么,以训练学生熟练掌握运算的顺序。如:
This unit review points are: 1. Four mixed operation sequence of operations and calculations based on the nature of the operation or computing nature of the order of simple calculation; 2. Column comprehensive formula to answer text questions; 3. Solutions to typical problems - encounter problems; 4 Answer a slightly more complicated multiplication problem. First, grasp the order of operations, training and computing skills Through the review of the four mixed operations, on the one hand requires students to master the order of the four mixed operations; the other hand requires the flexibility to use the nature of computing laws and computing properties for easy calculation, and through column synthesis formula to answer text Questions, training students in the analysis and comprehensive ability. 1. On the four mixed operation expression, “line drawing method” can be used to mark what to count, what to count, and finally what to train students master the order of operations. Such as: