Sagot :
Réponse :
Explications étape par étape
Bonsoir
A = 7/9 + 9
A = 7/9 + (9 x 9)/9
A = 7/9 + 81/9
A = 88/9
B = 9/2 + 6/7
B = (9 x 7)/(2 x 7) + (6 x 2)/(7 x 2)
B = 63/14 + 12/14
B = 75/14
C = -1/2 + (-4/8)
C = -1/2 - 4/(2 x 4)
C = -1/2 - 1/2
C = -2/2
C = -1
D = 4/9 + (-1/6)
D = (4 x 2)/(9 x 2) - (1 x 3)/(6 x 3)
D = 8/18 - 3/18
D = 5/18
E = -12/5 + 9/7 - 8/5
E = (-12 - 8)/5 + 9/7
E = (-20/5) + 9/7
E = (-4 x 5)/5 + 9/7
E = -4 + 9/7
E = (-4 x 7)/7 + 9/7
E = -28/7 + 9/7
E = -19/7
F = 25/15 - (-12/15)
F = 25/15 + 12/15
F = (25 + 12)/15
F = 37/15
G = 15/45 + 20/60 - 35/70
G = 15/(3 x 15) + 20/(3 x 20) - 35/(35 x 2)
G = 1/3 + 1/3 - 1/2
G = 2/3 - 1/2
G = (2 x 2)/(3 x 2) - (1 x 3)/(2 x 3)
G = 4/6 - 3/6
G = 1/6
H = 4/3 - (-6/5)
H = (4 x 5)/(3 x 5) + (6 x 3)/(5 x 3)
H = 20/15 + 18/15
H = (20 + 18)/15
H = 38/15
I = 11/8 + 11/2
I = 11/8 + (11 x 4)/(2 x 4)
I = 11/8 + 44/8
I = (11 + 44)/8
I = 55/8