Réponse :
a) 3x5/2x7 = 15/14
b) -4x1/11x(-3) = -4/-33 = 4/33
c) 3x(-7)/1x5 = -21/5
d) 5x5/-4x(-2) = 25/8
e) 8x5/17x(-3) = 40/-51
f) -13x(-2)/5x11 = 26/55
g) -7x(-8)/15x1 = 56/15 x 2/3 = 56x2/15x3 = 112/45
h) -1x5/2x(-4) = 5/8 x (-3)/2 = 5x(-3)/8x2 = -15/16
Explications étape par étape :
