计算下面各题,能简算的要简算. 75-15.38+61.25-4.62 765×64×0.5×2.5×0.125 50×96+57×4+7×66 0.0495×2500+495×0.24+51×4.95
问题描述:
计算下面各题,能简算的要简算. 75-15.38+61.25-4.62 |
765×64×0.5×2.5×0.125 |
50×96+57×4+7×66 | 0.0495×2500+495×0.24+51×4.95 |
答
(1)75-15.38+61.25-4.62=(75+61.25)-(15.38+4.62)=136.25-20=116.25;(2)765×64×0.5×2.5×0.125=765×(2×4×8)×0.5×2.5×0.125=765×(2×0.5)×(4×2.5)×(8×0.125)=765×1×10×1=7650;(3...