Bonjour
A= 5/8+ -13/6
A = (5 x 3) / (8 x 3) - (13 x 4) / (6 x 4)
A = 15/24 - 52/24
A = - 37/27
B= 441/234 ÷ 154/110
B = 441/234 x 110/154
B = 48 510/36 036
B = (1 386 x 35) / (1 386 x 26)
B = 35/26
C= -4/6 - 7/6× -2/5
C = -4/6 + 14/30
C = (- 4 x 5) / (6 x 5) + 14/30
C = - 20/30 + 14/30
C = - 6/30
C = (6 x - 1) / (6 x 5)
C = - 1/5.
