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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

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

先乘后两位得1,再跟第一位相乘得37

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

=37.8*(10/8)*(8/10)=37.5

37.2×108-372×0.8 =37.2x108-37.2x8 =37.2x(108-8) =37.2x100 =3720

37.8/(1.25*8/10) =37.8/(10/10) =37.8/1 =37.8

37.8÷1.25×0.8=37.8除以括号1.25乘以0.8括起来。(错)

37.8×1.25×0.8 =37.8×(1.25×0.8) =37.8×1 =37.8

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