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85.3+0.125x7.8x8的简便算法

3.27×8.5+67.3×0.85 =3.27×8.5+6.73×8.5 =(3.27+6.73)×8.5 =10×8.5 =85

=(7.15+0.85)+3.7 =8+3.7 =11.7

3.85+3.7+6.15 =3.85+6.15+3.7 =10+3.7 =13.7 谢谢,请采纳

18.3+3.85+2.73的简便计算 =18.3+3.7+0.15+2.73 =22+2.88 =24.88

85x125-85x24-85 =85×(125-24-1) =85×(125-25) =85×100 =8500

34x1.5+3.4x0.85 =34×(1.5+8.5) =34×10 =340

解: 原式 =85x(36+67-3) =85x100 =8500

2.85÷[(0.3+0.6)×5] =2.85÷[0.9×5] =2.85÷0.9÷5 =2.85÷5÷0.9 =0.57÷0.9 =57/9

0.73×45+7.3×5.5 =0.73×10×4.5+7.3×5.5 =7.3×4.5+7.3×5.5 =7.3×(4.5+5.5) =7.3×10 =73

86×3/85 = (85 + 1)×3/85 = 3 又 3/85

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