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1.72X1.4÷1.72X1.4(简便算法)

1.72X1.4÷1.72X1.4 =1.72÷1.72X1.4X1.4 =1X1.4X1.4 =1.96

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

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。

=12.6/1.4*(7.6/1.9)*(2.32/2.9) =9*4*0.8 =36*0.8 =144/5=28.8

参考

12.6x7.6x2.32➗1.9➗1.4➗2.9如何用简便计算? 12.6x7.6x2.32➗1.9➗1.4➗2.9 =(12.6÷4)*(7.6÷1.9)*(2.32÷2.9) =3.15*4*0.8 =10.08

X=[2,4,6,7,8]; Y=[0.4,0.6,0.8,0.9,1.0,1.2,1.4,2.0,3.10,4.3,5.5,6.0,7.0]; >> Z=[0.446,0.419,0.229,0.688,0.012; 0.457,0.473,0.400,0.396,0.372; 0.463,0.471,0.497,0.417,0.431; 0.504,0.492,0.475,0.140,0.519; 0.837,0.894,0.774,0.778,...

(1)6x+15=51, 6x+15-15=51-15, 6x=36, 6x÷6=36÷6, x=6;(2)3(x-8)=27, 3(x-8)÷3=27÷3, x-8=9, x-8+8=9+8, x=17;(3)x÷2.8=8.2,x÷2.8×2.8=8.2×2.8, x=22.96;(4)1.4x-0.7x=56, 0.7x=56, 0.7x÷0.7=56÷0.7, x=80.

0.5x0.6x0.7x0.8x0.9x1x1.1x1.2x1.3x1.4x1.5 =(0.5x0.6)x(0.7x0.8)x(0.9x1)x(1.1x1.2)x1.3x(1.4x1.5) =0.3x0.56x0.9x1.32x1.3x 2.1 =(0.3x0.56)x(0.9x1.32)x(1.3x 2.1) =0.168x1.188×2.73 =0.199584×2.73 =0.54486432

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