Oui bien sûr
A=-2/3 - 7/6
A=-2x2/3x2 - 7/6
A= -4/6 - 7/6
A= -4-7/6
A= -11/6
B=-5/2 + 1/3
B = -5x3/2x3 + 1×2/3×2
B = -15/6 + 2/6
B= -15+2/6
B= -13/6
C=-5/9 : 7/2
C= -5/9 × 2/7
C = -5×2/9×7
C = -10/63
D=-7 × (-5/4)
D=-7×(-5)/1×4
D=35/4
E= -2/7 + 5×(-3/5)
E= -2/7 + 5×(-3)/1×5
E = -2/7 + (-15/5)
E= -2×5/7×5 + (-15)×7/5×7
E = -10/35 + (-105)/35
E = -10-105/35
E = -115/35
E = -23/7
F= 2-5/2 / 5/4
F = 2×2/1×2 - 5/2 / 5/4
F = 4/2 - 5/2 / 5/4
F = 4-5/2 / 5/4
F = -1/2 / 5/4
F = -1/2 × 4/5
F= -4/10
