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1/2加2/5,减3/10加3/5的脱式计算.

脱式计算 1/2+2/5-3/10+3/5 =(1/2-3/10)+(2/5+3/5) =1/5+1 =1又1/5

=5/10-2/10+3/10 =6/10 =3/5

14/15-(2/5+3/10) =14/15-7/10 =28/30-21/30 =7/30 , 你好,本题已解答,如果满意 请点右上角“采纳答案

(4/5+1/10)+3/8 =9/10+3/8 =51/40 =1又11/40

先转换在算 先5分之4减10分之3,5分之4转换也就是10之8减掉10分之3=10分之5转换2分之1 最后2分之1+3分之2 转换6分之3+6分之4最终答案是6分之7

2/3乘以中括号3/10除以小括号1/3+2/5小括号中括号=2/3*【3/10/(1/3+2/5)】=2/3*【3/10/(11/15)=2/3*9/22=3/11。

17/20-(2/5+19/20) =17/20-(8/20+19/20) =17/20-27/20 =-10/20 =-1/2 3/10+1/3+1/10 =9/30+10/30+3/30 =19/30+3/30 =22/30 =11/15

解:依据题意有, 10*(3/(2.1+5.4)) =10*3/7.5 =4

9/10+(3/5+1/5) =9/10+4/5 =9/10+8/10 =17/10 =1又10分之7 =1.7

5/8-(1/8+1/3) =5/8-1/8-1/3 =4/8-1/3 =1/2-1/3 =3/6-2/6 =1/6 谢谢,请采纳

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