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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……

23×0.1+2.3×9.9 =23×(0.1+9.9) =230

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=(0.1+9.9)×99÷2 =10×99÷2 =495

red

3.2×9.9+0.1 =3.2×(10-0.1)+0.1 =3.2×10-3.2×0.1+0.1 =32-0.32+0.1 =29.78 求采纳

1.9+2.9+3.9+0.3 =(1.9+0.1)+(2.9+0.1)+(3.9+0.1) =2+3+4 =9

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

7.5x2.3+1.9x2.5+12.5x0.4 =2.5x3x2.3+1.9x2.5+2.5x5x0.4 =2.5x(6.9+1.9+2) =2.5x10.8 =2.5x(10+0.8) =2.5x10+2.5x0.8 =25+2 =27

2.85×9.9+0.01×28.5 =2.85×(9.9+0.1) =2.85×10 =28.5 你好,本题已解答,如果满意 请点右上角“采纳答案”。

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