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Lauval
@Lauval
April 2019
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Bonjour , pouvez vous m'aider svp :
Donner la réponse sous la forme d'une fraction irréductible :
A= 2/3 -5/9 B= 7/12 - 3 C= 1/3 - 1/4 + 1 D= 8/5 - -2/3 E= 4 x 9/12 F= 10/9 x 6/15 G= 4/-9 x -15/2 H= 6/-9 x -12/-16
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nonotata
Bonjour,
A= 2/3 -5/9 = 2*3/3*9 -5/9 = 6/9-5/9 = 1/9
B= 7/12 - 3 = 7/12 -36/12 = -29/12
C= 1/3 - 1/4 + 1 = 4/12 -3/12+12/12 = 16/12-3/16 = 13/12
D= 8/5 - -2/3 = 24/15 + 10/15 = 34/15
E= 4 x 9/12 = 9/3 = 3
F= 10/9 x 6/15 = 5*2 /3*3 x 3*2 /5*3 =2/3 x 2/3 = 4/9
G= 4/-9 x -15/2 = + 60/18 = 10/3
H= 6/-9 x -12/-16 = -2/3 x 3/4 = -2/4 = -1/2
1 votes
Thanks 1
lauval
Merci :) !
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A= 2/3 -5/9 = 2*3/3*9 -5/9 = 6/9-5/9 = 1/9
B= 7/12 - 3 = 7/12 -36/12 = -29/12
C= 1/3 - 1/4 + 1 = 4/12 -3/12+12/12 = 16/12-3/16 = 13/12
D= 8/5 - -2/3 = 24/15 + 10/15 = 34/15
E= 4 x 9/12 = 9/3 = 3
F= 10/9 x 6/15 = 5*2 /3*3 x 3*2 /5*3 =2/3 x 2/3 = 4/9
G= 4/-9 x -15/2 = + 60/18 = 10/3
H= 6/-9 x -12/-16 = -2/3 x 3/4 = -2/4 = -1/2