A= 2/4 + 5/6
A= (3*2)/(3*4) + (2*5)/(2*6)
A= 6/12 + 10/12
A= 16/12
A= 4/3
B= 5/12 - 1/4
B= 5/12 - (3*1)/(3*4)
B= 5/12 - 3/12
B= 2/12
B= 1/6
C= 5/18 - 7/9
C= 5/18 - (2*7)/(2*9)
C= 5/18 - 14/18
C= - 9/18
C= - 1/2
D= 4/15 + 2/5
D= 4/15 + (3*2)/(3*5)
D= 4/15 + 6/15
D= 10/15
D= 2/3
E= 1/3 + 1
E= 1/3 + 3/3
E= 4/3
F= - 3/7 - 1/14
F= (- 3*2)/(7*2) - 1/14
F= - 6/14 - 1/14
F= - 7/14
F= - 1/2
G= 2 - -3/1
G= 2 + 3
G= 5
H= 2/9 + 1/6
H= (2*2)/(2*9) + (3*1)/(3*6)
H= 4/18 + 3/18
H= 7/18
I= 9/15 - -7/10
I= (2*9)/(2*15) + (3*7)/(3*10)
I= 18/30 + 21/30
I= 39/30
I= 13/10
J= - 8 + 1/4
J= (-8*4)/4 + 1/4
J= -32/4 + 1/4
J= -31/4
K= 5/30 + 2/15
K= 5/30 + (2*2)/(2*15)
K= 5/30 + 4/30
K= 9/30
L= -1/14 + -2/21
L= (-1*21)/(14*21) - (2*14)/(21*14)
L= - 21/294 - 28/294
L= - 49/294
L= - 1/6
M= 3/14 - 2/21
M= (3*21)/(14*21) - (2*14)/(21*14)
M= 63/294 - 28/294
M= 81/294
M= 27/98
N= 5/18 + 1/27
N= (3*5)/(3*18) + (2*1)/(2*27)
N= 15/54 + 2/54
N= 17/54
O= 1/24 - -1/30
O= 1/24 + 1/30
O= (30*1)/(30*24) + (24*1)/(24*30)
O= 30/720 + 24/720
O= 54/720
O= 3/40
P= - 1/9 + 1/-15
P= - 1/9 - 1/15
P= (- 1*15)/(9*15) - (1*9)/(15*9)
P= - 15/135 - 9/135
P= - 24/135
P= - 8/45
Q= 19/42 + 2/21 - 1/3
Q= 19/42 + (2*2)/(21*2) - (1*14)/(3*14)
Q= 19/42 + 4/42 - 14/42
Q= 9/42
Q= 3/14
R= 17/42 + 2/21 - 1/3
R= 17/42 + (2*2)/(21*2) - (1*14)/(3*14)
R= 17/42 + 4/42 - 14/42
R= 8/42
R= 4/21
S= 8/35 - -2/35
S= 8/35 + 2/35
S= 10/35
S= 2/7
T= 3/8 - 2 - -1/8
T= 3/8 - 16/8 + 1/8
T= - 12/8
T= - 3/2
U= 7/3 * 27/14
U= (7*27)/(3*14)
U= 189/42
U= 9/2
V= -8/5 * -15/16
V= (-8*(-15))/(5*16)
V= 120/80
V= 3/2
W= 3/-4 : -9/40
W= 3/-4 * 40/-9
W= (3*40)/(-4*(-9))
W= 120/36
W= 10/3
X= 16/9 * 3/14 * 5/8
X= (16*3*5)/(9*14*8)
X= 240/1008
X= 5/21
Si tu as des questions, n'hésite pas! =)