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23x0.1+2.3x9.9怎么样简便计算

你好: 23x0.1+2.3x9.9 =2.3x1+2.3x99 =2.3x(99+1) =2.3X100 =230 如果满意记得采纳! 求好评! (*^__^*) 嘻嘻……

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原式等于 2.63×(9.9+0.1) =2.63×10 =26.3 所以原式的计算结果为26.3

0.1x9.9x0.2 =0.1x0.2x9.9 =0.02x(10-0.1) =0.2-0.002 =0.198

简便计算:先算乘除,后算加减 3.2÷0.08+1.9x2 =40+1.9x2 =40+3.8 =43.8

如图

=2.3+(10-0.1)*7.7+7.8+2.3*(2+0.1) =2.3+77-0.77+7.8+4.6+0.23 =77+14.7-0.54 =77+13.16 =90.16

1.72+0.53+0.28+1.47 =(1.72+0.28)+(0.53+1.47) =2+2 =4 3.2×1.25×2.5 =4×0.8×1.25×2.5 =(4×2.5)×(0.8×1.25) =10×1 =10 3.9×99 =3.9×(100-1) =3.9×100-3.9×1 =390-3.9 =386.1

9.8X3.6+0.1X2X3.6 =(9.8+0.2)X3.6 =10X3.6 =36 如果我的回答对您有帮助,请点击下面的“选为满意答案”按钮,谢谢您!

(1)X-1/2-1=(2-3X)/3 x-3/2=(2-3x)/3(通分) 6x-9=2(2-3x) 6x-9=4-6x 12x=13 x=13/12 验算: 13/12-3/2=(2-3*13/12)÷3 (13-18)/12=(-5/4)×1/3 -5/12=-5/12 (2)X-3+(6X-X²)/(x+3)=0 x-3+(6x-x²)×1/(x+3)=0(通分)...

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