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《大纲》指出,在小学数学教学中,“要注意提高学生的口算能力。”但数学时,我们可结合哪些内容,让学生掌握哪些方法呢?我的意见是—— 1.结合数的分解,让学生学会把一个数分解成整百、整十等进行口算的方法。如,67+38=67+30+8=105。 2.结合连乘、连除教学,让学生学会将乘、除数是两位数的乘、除法,改为乘、除数是一位数的连乘、连除法进行口算。如,125×16=125×8×2=1000×2=……;350÷25=350+5÷5=……。
The Outline states that “in primary school mathematics teaching,” we should pay attention to improving students' ability to communicate. "But in mathematics, what can we combine to enable students to master what? My opinion is - 1. The combination of number decomposition , So that students learn to break a number into a whole hundred, the whole ten and so on the mouth count method. For example, 67 + 38 = 67 + 30 + 8 = 105. 2. Combined with multiplication, even in addition to teaching, so that students will learn to multiply, the divisor is a double-digit multiplication, division, to multiply, the divisor is a one-digit even multiplication, even the division of conduct. For example, 125 × 16 = 125 × 8 × 2 = 1000 × 2 = ...; 350 ÷ 25 = 350 + 5 ÷ 5 = ....