pouvez vous m'aider svp je ne comprend pas ces fractions merci A=1/4-3/4 B=3/2-1/4 c=1/2+4/3 D=5/-2-3/5 E=-5/-3+2/7 F= - -1/-6-5/-4 G=-2./5x-3/-7 H=7/-6x3/-4 I=
Mathématiques
rama30
Question
pouvez vous m'aider svp je ne comprend pas ces fractions merci
A=1/4-3/4
B=3/2-1/4
c=1/2+4/3
D=5/-2-3/5
E=-5/-3+2/7
F= - -1/-6-5/-4
G=-2./5x-3/-7
H=7/-6x3/-4
I=-9/2:3/-5
J=1/-8:-7/-21
K=-4/-5:7/-13
L=15/-7x-14/-3
1 Réponse
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1. Réponse maudmarine
A = 1/4 - 3/4
A = 2/4
A = 2 x 1 / 2 x 2
A = 1/2
B = 3/2 - 1/4
B = 3 x 2 / 2 x 2 - 1/4
B = 6/4 - 1/4
B = 5/4
C = 1/2 + 4/3
C = 1 x 3 / 2 x 3 + 4 x 2 / 3 x 2
C = 3/6 + 8/6
C = 11/6
D = 5/ -2 - 3/5
D = - 5/2 - 3/5
D = - 5 x 5 / 2 x 5 - 3 x 2 / 5 x 2
D = - 25/10 - 6/10
D = - 31/10
E = -5/-3 + 2/7
E = 5/3 + 2/7
E = 5 x 7 / 3 x 7 + 2 x 3 / 7 x 3
E = 35/21 + 6/21
E = 41/21
F = - 1/-6 - 5/-4
F = 1/6 + 5/4
F = 1 x 4 / 6 x 4 + 5 x 6 / 4 x 6
F = 4/24 + 11/24
F = 15/24
F = 3 x 5 / 3 x 8
F = 5/8
G = -2./5 x -3/-7
G = - 6/35
H = 7/-6 x 3/-4
H = - 7/6 x - 3/4
H = 21/24
H = 3 x 7 / 3 x 8
H = 7/8
I = - 9/2 : 3/-5
I = - 9/2 x - 5/3
I = 45/6
I = 3 x 15 / 3 x 2
I = 15/2
J = 1/-8 : -7/-21
J = - 1/8 : 7/21
J = - 1/8 x 21/7
J = - 21/56
J = 7 x - 3 / 7 x 8
J = - 3/8
K = -4/-5 : 7/-13
K = 4/5 : - 7/13
K = 4/5 x - 13/7
K = - 52/35
L = 15/-7 x -14/-3
L = - 15/7 x 14/3
L = - 210/21
L = 21 x - 10 / 21 x 1
L = - 10/1
L = - 10