五年级上册小数乘法简便运算.备考期中
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简介
0.25×8.5×4 =0.25×4×8.5 =1×8.5 =8.5 0.5×7.49×2 =0.5×2×7.49 =1× 7.49 =7.49 0.25×16.2×4 =0.25×4×16.2 =1×16.2 =16.2 4.36×12.5×8 =4.36×（12.5×8） =4.36×100 =436 0.95×0.25×4 =0.95×（0.25×4） =0.95×1 =0.95 0.75×50×0.4 =0.75×（50×0.4） =0.75×20 =15 (1.25－0.125)×8 =1.25×8-0.125×8 =10-1 =9 （20－4）×0.25 =20×0.25-4×0.25 =5-1 =4 （125+2.5）×0.8 =125×0.8+2.5×0.8 =100+2 =102
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