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小学数学第二册复习的重点是:在100以内数的认识的基础上,学好100以内的加法和减法,熟练地计算2—5的表内乘法。复习时要紧扣教材,抓住知识间的内在联系,使学生全面系统地掌握知识。 1.复习两位数加减两位数之前,先复习整十数加整十数和一位数及相应的减法,以加深学生对数位、数的组成和分解的认识。这样既复习了100以内数的认识,又为复习两位数加、减两位数打下基础。如:30+20=50-20=50—30=40+5=45-5=45-40=……
The second volume of primary school mathematics review focuses on: based on the understanding of the number of 100, learn 100 addition and subtraction, proficient in the calculation of 2-5 on-table multiplication. Review the materials to be closely linked to grasp the intrinsic link between knowledge so that students a comprehensive and systematic grasp of knowledge. 1. Review the double-digit addition and subtraction of double-digit before reviewing the whole number of decimals plus ten and a digit and the corresponding subtraction, in order to deepen the students of digital, the composition and decomposition of the number of understanding. This will not only review the number of 100 within the understanding, but also to review the double-digit plus, minus double-digit basis. Such as: 30 +20 = 50-20 = 50-30 = 40 +5 = 45-5 = 45-40 = ...