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2.5×37.8×0.8怎么用简便方法计算

2.5×37.8×0.8怎么用简便方法计算 2.5×37.8×0.8 =2.5x0.4x2x37.8 =1x75.6 =75.6

101×37.8-1.25×37.8×0.8用简便方法计算 =37.8x(101-1) =37.8x100 =3780

2.7×3.7+0.37×0.8 =2.7×3.7+3.7×0.08 =3.7×(2.7+0.08) =3.7×2.78 =10.286

本题直接计算最简便 解: 37.8÷1.25×0.8 =30.24×0.8 =24.192 结果是24.192

先乘后两位得1,再跟第一位相乘得37

解:运用拆分法和提取公因式的简便方法, 原式=27x0.37+0.37x0.8 =0.37x(27+0.8) =0.37x27.8 =10.286

83.7×0.2+8.37×7+8.37 =8.37*2+8.37*7+8.37 =8.37*(2+7+1) =83.7

解:3.72×8+37.2×0.2 =3.72×8+3.72×2 =3.72×(8+2) =3.72×10 =37.2

7.8×0.37+2.2×0.37 =(7.8+2.2)×0.37 =10×0.37 =3.7

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