A = 2/3 - 4/3 : 8/5
A = 2/3 - 20/24
A = 16/24
A = 8/12
A = 4/6
A = 2/3
B = 9 au carré + ( -5 + 7 ) ( -10 ) X au cube
B = 9 au carré + 2 x -10 x X au cube
B = 81 + 2 x 10 x 3X
B = 81 + 20 x 3X
B = 81 + 60X
C = -7 + 54 -2.5
C = - 9.5 + 54
C = 44.5
D = -10-8 / 4-(-2)
D = -18 / 6
D = -9 / 3
D = -3 / 1