要过程
9/20(20分之9):X=3/8(8分之3)
X:19/91(91分之19)=49/38(38分之49
7/10(10分之7):X=1/4(4分之1)
X:3/4(4分之3)=1/7(7分之1)
9/20ï¼20åä¹9ï¼ï¼X=3/8ï¼8åä¹3ï¼
3/8*x=9/20
x=9/20*8/3
x=6/5
Xï¼19/91ï¼91åä¹19ï¼=49/38ï¼38åä¹49
x=49/38*19/91
x=7/26
7/10ï¼10åä¹7ï¼ï¼X=1/4ï¼4åä¹1ï¼
1/4*x=7/10
x=7/10*4
x=14/5
Xï¼3/4ï¼4åä¹3ï¼=1/7ï¼7åä¹1)
x=1/7*4/3
x=4/21
3/8*x=9/20
x=9/20*8/3
x=6/5
Xï¼19/91ï¼91åä¹19ï¼=49/38ï¼38åä¹49
x=49/38*19/91
x=7/26
7/10ï¼10åä¹7ï¼ï¼X=1/4ï¼4åä¹1ï¼
1/4*x=7/10
x=7/10*4
x=14/5
Xï¼3/4ï¼4åä¹3ï¼=1/7ï¼7åä¹1)
x=1/7*4/3
x=4/21
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第1个回答 2011-01-05
(9/20):x=3/8
x=(9/20)/(3/8)
=6/5
x:(19/91)=49/38
x=(49/38)*(19/91)
=49/182
(7/10):x=1/4
x=(7/10)/(1/4)
=(7/10)*4
=14/5
x:(3/4)=1/7
x=(1/7)*(3/4)
=3/28
x=(9/20)/(3/8)
=6/5
x:(19/91)=49/38
x=(49/38)*(19/91)
=49/182
(7/10):x=1/4
x=(7/10)/(1/4)
=(7/10)*4
=14/5
x:(3/4)=1/7
x=(1/7)*(3/4)
=3/28