五年级上册数学小数简便运算汇总

五年级上册数学小数简便运算汇总

  • 简介

    7.8×11-7.8 =7.8×(11-1) =7.8×10 =78 1.25×3.2×0.25 =1.25×8×0.4×0.25 =10×0.4×0.25 =4×0.25 =1 4.3×1.02 =4.3×(1+0.02) =4.3×1+4.3×0.02 =4.3+0.086 =4.386 0.78×101 =0.78×(100+1) =0.78×100+0.78×1 =78+0.78 =78.78 2.5×7.1×4 =(2.5×4)×7.1 =10×7.1 =71 1.2×2.5+0.8×2.5 =(1.2+0.8)×2.5 =2×2.5 =5

五年级上册数学小数简便运算汇总