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12.6×7.6×2.32÷1.9÷1.4÷2.9用简便方法怎样运算

原式 =(12.6÷1.4)x(7.6÷1.9)x(2.32÷2.9) =9x4x0.8 =36x0.8 =28.8 供参考。

原式=(12.6÷1.4)×(7.6÷1.9)×(2.32÷2.9) =9×4×0.8 =36×0.8 =28.8 望采纳,谢谢

18.9-18.9÷1.4+18.9 = 18.9-27÷2+18.9 = 18.9-13.5+18.9 = 5.4+18.9 = 24.3

18.9-18.9除以1.4 =18.9-13.5 =5.4

1.4×2.9-1.38÷0.6=1.4×3-1.4*0.1-13.8÷6=4.2-0.14-2.3=1.9-0.14=1.76

18.9-18.9÷1.4 =18.9- 13.5 =5.4

原式 =(7.6x2.8+1.4x4x1.9-2.8x1.4)÷2.5x4 =(7.6x2.8+1.4x7.6-2.8x1.4)÷2.5x4 =[7.6x(2.8+1.4)-2.8x1.4]÷2.5x4 =(7.6x4.2-2.8x1.4)÷2.5x4 =(7.6x3x1.4-2.8x1.4)÷2.5x4 =(22.8x1.4-2.8x1.4)÷2.5x4 =20x1.4÷2.5x4 =20÷2.5x1.4x4 =8x1.4x4 =11.2x4...

(1)(7.5-4.5÷3)×1.4,=(7.5-1.5)×1.4,=6×1.4,=8.4;(2) 4 5 × 3 7 + 4 7 ÷ 5 4 ,= 4 5 ×( 3 7 + 4 7 ),= 4 5 ×1,= 4 5 ;(3) 11 8 - 7 11 × 5 7 - 6 11 ,= 11 8 - 5 11 - 6 11 ,= 11 8 -( 5 11 + 6 11 ),= 11 8 -1,= 3 ...

12.6÷2.8 3.2×1.4的简便算法 12.6÷2.8 3.2×1.4 =4.5+4.48 =8.98 直接计算 没有简算

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