3/4-(2/5+3/10)= 5/7+1/4—9/4= 3/4+3/6-5/8 = 5/9+(3/4-1/2)= 1/10+3/8-1/2= 3/5-(2/15)=

(全要递等式)

第1个回答  推荐于2021-01-15
3/4-(2/5+3/10)=
=3/4-(4/10+3/10)
=3/4-4/10
=15/20-8/20
=7/20

5/7+1/4—9/4
=5/7-8/4
=5/7-2
=5/7-14/7
=-9/7

3/4+3/6-5/8
=18/24+12/24-15/24
=15/24

5/9+(3/4-1/2)
=5/9+3/4-2/4
=5/9+1/4
=20/36+9/36
=29/36

1/10+3/8-1/2=
=1/10+3/8-4/8
=1/10-1/8
=4/40-5/40
=-1/40

3/5-(2/15)
=3/5-2/15
=9/15-2/15
=7/15追问

能约分的都约分

追答

没有要约分的了

追问

其实我会的我懒的想而已

本回答被提问者采纳

3\/4-(2\/5+3\/10)= 5\/7+1\/4—9\/4= 3\/4+3\/6-5\/8 = 5\/9+(3\/4-1\/2)= 1\/...
=3\/4-(4\/10+3\/10)=3\/4-4\/10 =15\/20-8\/20 =7\/20 5\/7+1\/4—9\/4 =5\/7-8\/4 =5\/7-2 =5\/7-14\/7 =-9\/7 3\/4+3\/6-5\/8 =18\/24+12\/24-15\/24 =15\/24 5\/9+(3\/4-1\/2)=5\/9+3\/4-2\/4 =5\/9+1\/4 =20\/36+9\/36 =29\/36 1\/10+3\/8-1\/2= =1\/10+...

3\/4-(2\/5+3\/10)等于多少?
分数计算 3\/4-(2\/5+3\/10)=3\/4-(4\/10+3\/10)=3\/4-7\/10 =15\/20-14\/20 =1\/20

3\/4一(2\/5+3\/10)等于多少?
你好,这个题目就是直接通分计算就可以了,也可以先算括号里面的,就是4\/10+3\/10就是7\/10,然后前面的3\/4就可以看成是15\/20,减去14\/20,所以最后的结果就是1\/20。

...1\/4= 1\/6-1\/9+7\/12= 1-2\/5-2\/7= 3\/4+(4\/5-1\/4)= 3\/5-(1\/10+3\/8...
3\/4+1\/3-5\/6=1\/4 3\/8+1\/2-1\/4= 5\/8 1\/6-1\/9+7\/12=23\/36 1-2\/5-2\/7=11\/35 3\/4+(4\/5-1\/4)= 13\/10 3\/5-(1\/10+3\/8)=1\/8 2\/3-(5\/6-5\/8)= 11\/24 2\/3-4\/7+5\/6=13\/14 用简便的...

4\/3-(2\/5+3\/10)怎么算?只要答 5\/7+1\/4-9\/14 案。 3\/4+3\/6
4\/3—(2\/5+3\/1O丿=4O\/3O一{I2\/30+9\/3o)=4o\/30_21\/3o=丨9\/30先通分再计算

3\/4-(2\/3-1\/5)简便计算?
3\/4-(2\/3-1\/5)简便计算?先通分再计算:3\/4-(2\/3-1\/5)=3\/4-(2\/3-1\/5)=3\/4-2\/3+1\/5 =45\/60一40\/60+12\/60 =(45-40+12)\/60 =17\/60

3\/4-(5\/2+10\/3)等于多少
回答:原式=(1*3*5)(1+2+3+4+5)\/(1*2*3)(1+2+3+4+5) =1*3*5\/1*2*3 =5\/2

下面各题,怎样简便就怎样算。 3\/4-2\/5-1\/3 4\/5-3\/10+4\/15 3\/4-(3\/8
稍等,正在作答

3\/4-3\/5等于几分之几?2\/9+4\/15等于几分之几?1\/5+3\/7等于几分之几?
答案为3\/20。2\/9 + 4\/15 同样地,需要将两个分数的分母取最小公倍数,即45。2\/9 = 10\/45 4\/15 = 12\/45 因此,2\/9 + 4\/15 = 10\/45 + 12\/45 = 22\/45 答案为22\/45。1\/5 + 3\/7 需要将两个分数的分母取最小公倍数,即35。1\/5 = 7\/35 3\/7 = 15\/35 因此,1\/5 +...

...2\/5--3\/5=、5\/9--5\/12+4\/9=、2\/3+7\/10+1\/3+3\/10=、8\/9--(1\/5...
=5\/8+3\/8+7\/9 =1+7\/9 =1又7\/9 25\/18--2\/5--3\/5 =25\/18-(2\/5+3\/5)=25\/18-1 =7\/18 5\/9--5\/12+4\/9 =5\/9+4\/9-5\/12 =1-5\/12 =7\/12 2\/3+7\/10+1\/3+3\/10 =2\/3+1\/3+(7\/10+3\/10)=1+1 =2 8\/9--(1\/5--1\/9)=8\/9+1\/9-1\/5 =1-1\/...

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