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3.9+0.1%3.9+0.1用简便方法计算怎么计算?

=3.9-3.9+0.1+0.1=0.2

=(3.9-3.9)+(0.1+0.1) =0+0.2 =0.2

3.9+0.1-3.9+0.1用简便方法怎么算 3.9+0.1-3.9+0.1 =(3.9-3.9)+(0.1+0.1) =0+0.2 =0.2

3.9+0.1-3.1+0.1用简便运算 =(3.9+0.1)-(3.1-0.1) =4-3 =1

解: 3.8/3.9+3.9/0.1+0.1/3.9 =38/39+39+1/39 =39+(38/39+1/39) =39+1 =40

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

3.8/3.9+3.9/0.1+0.1/3.9 =1/3.9*(3.8+0.1)+39 =1+39 =40

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……

把0.3拆成3个0.1,先加到前3个数中去 结果222

3.9-1.27-0.73+16.1 =(3.9+16.1)-(1.27+0.73) =20-2 =18 如果对您有帮助; 请采纳答案,谢谢。

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