四升五数学•小数乘法简便计算

四升五数学•小数乘法简便计算

  • 简介

    类型(一):“拆分型”—“99”、“101”、“补1”型 8.75×11-8.75 =8.75×11-8.75×1 =8.75×(11-1) =8.75×10 =87.5 0.67×99 =0.67×(100-1) =0.67×100-0.67×1 =67-0.67 =66.33 8.8×1.25 =1.1×8×1.25 =1.1×(8×1.25) =1.1×10 =11 25×3.2×125 =25×(4×0.8)×125 =(25×4)×(0.8×125) =100×100 =10000

四升五数学•小数乘法简便计算