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4/5÷[(3/5+1/2)×2]的简便计算

4/5÷[(3/5+1/2)×2] =4/5÷(3/5x2+1/2x2) =4/5÷(6/5+1) =4/5÷11/5 =4/11

5.2×3.4÷1.7+5.2 =5.2×(3.4÷1.7)+5.2 =5.2×2+5.2 =5.2×(2+1) =5.2×3 =15.6

1/3-(4/5-2/3)÷3/5 =1/3-(4/5-2/3)*5/3 =1/3-4/5*5/3+2/3*5/3 =1/3-4/3+10/9 =-1+1+1/9 =1/9

5除以(2/3+1/5)乘1/13 =5÷(10/15+3/15)x1/13 =5÷13/15x1/13 =5x15/13x1/13 =75/169 =169分之75 如果对您有帮助; 请采纳答案,谢谢。

13/15+1/2÷(4/5)+3/8用简便方法计算 解:采用结合律, 原式=13/15+1/2÷(4/5)+3/8 =13/15+1/2X5/4+3/8 =13/15+(5/8+3/8) =13/15+1 =1又13/15

能。 原式=(1/2-1/12)*2/5+1*2/5 =(5/12+1)*2/5 =17/12*2/5 =17/30. 望采纳

一加二的零次方等于二,二加二的一次方等于六,就是找二的n次方的规律,42之后是42加上二的五次方,所以填74

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