bonjour c'est tres urgent calcul en détaillant et donner le résultat sous forme de fractions simplifier. Le plus petit dénominateur. A=(1 /8 -7/12):(7/6+7/16) B

A=(1/8 -7/12):(7/6+7/16)
a = (3/24 -14/24 ) / (56/48+21/48)
a = -11/24 : 77/48
a = -11/24 x 48/77
a = -11 x 48 / 77 x24
a = -1x2 /7x1
a = -2/7

B =1/8-7/12:7/6+7/12
b = 1/8 - 42/84 + 7/12
b = 1 x 84 / 8 x 84 - 42 x 8 / 84 x 8 + 7 x 56 / 12 x 56
b = 84/672 - 36/672 + 392/672
b = 440/672
b = 8 x 55 / 8 x 54
b= 55/84



C=(1/8+7/12)x(6/5+4/15)
c =( 3/24 +14/24 ) x (18/15 +4/15)
c = 17/24 x 22/15
c = 17x22 / 24x15
c = 17x11 / 12x15
c = 187/180

A = (1/8 - 7/12) : (7/6 + 7/16)
A = (1 x 3 / 8 x 3 - 7 x 2 / 12 x 2) : (7 x 8 / 6 x 8  + 7 x 3 / 16 x 3)
A = (3/24 - 14/24) : (56/48 + 21/48)
A = - 11/24 : 77/48
A = - 11/24 x 48/77
A = - 528/1848
A = 264 x 2 / 264 x 7
A = 2/7

B = 1/8 - 7/12 : 7/6 + 7/12
B = 1/8 - 7/12 x 6/7 + 7/12
B = 1/8 - 42/84 + 7/12
B = 1 x 84 / 8 x 84 - 42 x 8 / 84 x 8 + 7 x 56 / 12 x 56
B = 84/672 - 36/672 + 392/672
B = 440/672
B = 8 x 55 / 8 x 54
B = 55/84

C = (1/8 + 7/12) x (6/5 + 4/15)
C = (1 x 3 / 8 x 3 + 7 x 2 / 12 x 2) x (6 x 3 / 5 x 3 + 4/15)
C = (3/24 + 14/24) x (18/15 + 4/15)
C = 17/24 x 22/15
C= 374/360
C = 2 x 187 / 2 x 180
C = 187/180