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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

根据分配率(1.4-0.2)÷0.6

=4.06+28.8 =32.86

1、用竖式计算 0.396÷1.2= 0.756÷0.36= 15.6×13= 0.18×15= 0.025×14= 3.06×36= 0.04×0.12= 3.84×2.6≈ 5.76×3= (保留一位小数) 7.15×22 90.75÷3.3 3.68×0.25 16.9÷0.13 1.55÷3.9 3.7×0.016 13.76×0.8= 5.2×0.6 8.4×1.3 6.4×0.5 4.48×0.4 5.25...

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

望采纳谢谢。(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25 (4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10 (5)12.5×7.4×0.8 =12.5×0.8×7.4 =74 (6)6.5×9.5+6.5×0...

(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 ...

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