五年级数学上册 【小数乘法的简便运算】

五年级数学上册 【小数乘法的简便运算】


简介:
1.25×8.8 0.25×32 8.6×1.01 =1.25×8×1.1 =0.25×4×8 =8.6×(1+0.01) =10×1.1 =1×8 =8.6×1+8.6×0.01 =11 =8 =8.6086 2.5×0.32 2.7×10.2 9.8×25 =2.5×0.4×0.8 =2.7×(10+0.2) =(10-0.2)×25 =1×0.8 =2.7×10+2.7×0.2 =10×25-0.2×25 =0.8 =27.54 =245