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《两步计算的加减应用题》是学生学习两步应用题的开端。学生学习这章的难点是找“中间问题,而找出”中间问题“是解答两步应用题的关键。如何指导学生找出”中间问题“呢?一、拆拼题目,找出”中间问题“。两步计算的加减应用题可以拆成两个连续问的简单应用题,两个连续问的简单应用题又可拼成一个问的两步计算的加减应用题,通过拆后又合,可找出”中间问题“。如:”同学们为图书馆修补图书。二年级修补了78本,三年级比二年级多修补
“Addition and subtraction two-step calculation of application questions” is the beginning of two-step student learning problems. Students learn the difficulty of this chapter is to find “intermediate problem, and find ” intermediate problem “is the key to answer the two-step application problem.How to guide students to find ” intermediate problem Find the “intermediate problem.” Two-step calculation of the addition and subtraction of application questions can be split into two consecutive questions of simple application questions, two consecutive questions can also be asked a simple question asked two-step calculation of the addition and subtraction Application questions, through the demolition Houhe together to find “Intermediate question ” Such as: "Students for the library repair books. The second grade repaired 78, the third grade more than the second grade repair