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案例1教学分数四则运算后 ,四位同学上台板算 :5 18×37+ 38× 17。三名同学按四则运算的一般顺序得出正确答案 ,另一名同学解答为 :原式= 5 18× 17+ 38× 17= (5 18+ 38)× 17=2 32 8该同学的计算结果固然是错误的。但我被他的解答过程吸引了 ,试图运用乘法分配律使计算简便
Case 1 Teaching Score Four operations, four students on the board count: 5 18 × 37 +38 × 17. Three students in accordance with the general order of four operations to arrive at the correct answer, another classmate answer is: Original = 5 18 × 17 + 38 × 17 = (5 18 + 38) × 17 = 2 32 8 The students' calculation results Of course it is wrong. But I was drawn to his solution process and tried to use the multiplication method to make calculations easy