《用8的口诀求商》教学课件.ppt
苏教版小学数学二年级上册,用8的口诀求商,复习巩固,开火车,81587824642,2888122255 355,8,40,56,4,2,16,64,6,5,7,新知讲解,4,把花边平均剪成2段,每段长多少厘米?,新知讲解,乘法口诀,二()十六,八,把花边平均剪成2段,每段长多少厘米?,4,8,厘米,新知讲解,4,把花边平均剪成8段,每段长多少厘米?,新知讲解,乘法口诀,()八十六,二,把花边平均剪成8段,每段长多少厘米?,4,2,厘米,新知讲解,4,8,厘米,2,厘米,二八十六,及时练习,六()四十八,八,8,()八五十六,七,7,及时练习,你会根据口诀写乘法和除法算式吗?,五八四十,5,8,40,8,5,40,40,8,5,40,5,8,想想做做,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,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,