第 5 课 时 用8的口诀求商,新知探究,2,8,厘米,8,2,厘米,4,1.,38,24,243,8,248,3,84,32,328,4,324,8,78,56,567,8,568,7,想想做做,2.根据一句8的乘法口诀说出两道除法算式。,想想做做,一八得八可以写出除法算式:81=8,88=1 答案不唯一,3.,648,8,324,8,488,6,81,8,568,7,243,8,162,8,488,6,405,8,408,5,168,2,248,3,想想做做,4.,81,8,81,8,82,4,82,16,84,2,84,32,88,1,88,64,想想做做,5.,32,8,4,组,想想做做,