(数学)3/4+1/3-5/6= 3/8+1/2-1/4= 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= 3/8+1/2-1/4= 1/6-1/9+7/12= 1-2/5-2/7= 3/4+(4/5-1/4)= 3/5-(1/10+3/8)= 2/3-(5/6-5/8)= 2/3-4/7+5/6=

用简便的方法做
7/9+5/7+5/9= 12/25-1/8-1/24= 1-2/5-7/20=
5/8+4/7+9/8-14/1= 5/9-(1/3+1/8)=

从4/5里减去1/5与2/7的和,差是多少?

2/5加上7/10,再减去11/20,得多少?

5/6加上5/8与1/4的差,和是多少?

第1个回答  2011-05-18
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
用简便的方法做
7/9+5/7+5/9=34/21 12/25-1/8-1/24=47/150 1-2/5-7/20=1/4
5/8+4/7+9/8-14/1=负数 5/9-(1/3+1/8)=7/72
从4/5里减去1/5与2/7的和,差是多少?
4/5-(1/5+2/7)=11/35
2/5加上7/10,再减去11/20,得多少?
2/5+7/10-11/20=11/20
5/6加上5/8与1/4的差,和是多少?
5/6+(5/8-1/4)=29/24本回答被提问者和网友采纳
第2个回答  2011-05-18
3/4+1/3-5/6= 9/12+4/12-10/12=1/4
3/8+1/2-1/4= 3/8+2/4-1/4=3/8+1/4=3/8+2/8=5/8
1/6-1/9+7/12= 3/4-1/9=23/36
1-2/5-2/7=1-(14/35+10/35)=11/35
3/4+(4/5-1/4)= 3/4+(16/20-5/20)=15/20+11/20=26/20=13/10
3/5-(1/10+3/8)=6/10--1/10-3/8==1/2-3/8=1/8
2/3-(5/6-5/8)=16/24-(20/24-15/24)=11/24
2/3-4/7+5/6=9/6-4/7=21/14-8/14=13/14
用简便的方法做
7/9+5/7+5/9=(7/9+5/9)+5/7=12/9+5/7=4/3+5/7=28/21+15/21=43/21
12/25-1/8-1/24=12/25-(1/8+1/24)=12/25-(3/24+1/24)=12/25-1/6= 72/150-25/150=47/150
1-2/5-7/20= 1-(8/20+7/20)=1/4
题目打错了吧[5/8+4/7+9/8-14/1=]→5/8+4/7+9/8-1/14=7/4+1/2=9/4
[ 5/8+4/7+9/8-14/1=7/4+4/7-14=49/28+16/28-14=65/28-14= -83/7 ]
5/9-(1/3+1/8)=5/9-1/3-1/8=5/9-3/9-1/8=2/9-1/8=7/72

从4/5里减去1/5与2/7的和,差是多少?
4/5-(1/5+2/7)=4/5-1/5-2/7=3/5-2/7=11/35

2/5加上7/10,再减去11/20,得多少?
(2/5+7/10)-11/20=(4/10+7/10)-11/20=11/10-11/20=22/20-11/20=11/20

5/6加上5/8与1/4的差,和是多少?
5/6+(5/8-1/4)=5/6+(5/8-2/8)=5/6+3/8=20/24+9/24=29/24
第3个回答  2011-05-18
我不知道
第4个回答  2011-05-18
热,通分不行吗!!!!

(数学)3\/4+1\/3-5\/6= 3\/8+1\/2-1\/4= 1\/6-1\/9+7\/12= 1-2\/5-2\/7= 3\/4+...
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...

...得数1\/7+2\/3= 1\/2+1\/3= 3\/4-3\/8= 1-7\/9= 2-1\/6= 2\/5+3\/5= 5\/6...
1\/2+1\/3=5\/6 3\/4-3\/8=3\/8 1-7\/9=2\/9 2-1\/6=11\/6 2\/5+3\/5=1 5\/6-2\/3=1\/6 4\/5+1\/6-4\/5=1\/6 7\/8-5\/12+5\/6 =7\/8+5\/12 =31\/24 4\/5-(1\/6+1\/12)=4\/5-1\/4 =11\/20 2\/5+(3\/4+3\/5+1\/4)=2\/5+8\/5 =2 4-8\/13-5\/13 =4-1 =3 4\/5...

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

3\/4+3\/5-1\/2简便计算 1-(3\/4-3\/10)简便计算?
解题过程:3\/4+3\/5-1\/2 =3\/4-2\/4+3\/5 =1\/4+3\/5 =5\/20+12\/20 =17\/20 存疑请追问,满意请采纳

数学题 1\/3+1\/6=1\/2 1\/4+1\/12=1\/3 1\/5+1\/20=1\/4 …… 1\/x+
回答:第四排是: 1\/6+1\/30=1\/5 ... 1\/81-1\/80 =-1\/6480

...12=(1\/2+1\/3)-(1\/4+1\/3)=1\/2+1\/3-1\/4-1\/3=1\/2-1\/4?
5\/6-7\/12=(1\/2+1\/3)-(1\/4+1\/3)=1\/2+1\/3-1\/4-1\/3=1\/2-1\/4= =(18+1\/9)+(- 1\/36+(-1\/9))-(1\/22-(-1\/12))+(1\/11+1\/12)=1\/4,9,=(18+1\/9)+(- 1\/36+(-1\/9))-(1\/22-(-1\/12))+(1\/11+1\/12)=1\/4,0,= 41,0,五年级找规律填数 5\/6-7\/...

3\/4+7\/4分数表示等于几,1\/2+1\/3分数表示等于几3\/4-3\/8分数表示等于几...
3\/4+7\/4分数表示等于5\/2,1\/2+1\/3分数表示等于5\/6,3\/4-3\/8分数表示等于3\/8,因为,72÷9=8,所以72是8和9的倍数,8和9是72的因数。

3\/4+1\/6-2\/3脱式计算?
先分母通分,然后分子相加减。具体过程如图所示,请忽略字体难看

3\/5+(3\/4-1\/6) 计算?
3\/5+(3\/4-1\/6)=3\/5+3\/4-1\/6 =36\/60+45\/60-10\/60 =71\/60 这里可以通过计算得的答案是71\/60。

.直接写出得数 (5分)1\/5+1\/6= 1\/3-1\/4= 1-3\/8= 5\/6-1\/2= 5\/8?
1\/5+1\/6= 30分之11 ,1\/3-1\/4= 12分之1,1-3\/8=8分之5,5\/6-1\/2=6分之2,5\/8=0.625.

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