Réponse:
a. = 2/3 × 1/5 = 2/15
b. = -5/7 -4 = -33/7
c. = -5/6 × 11/7 = -55/42
d. = 8×8=64
e. = 3/2 × 7/5 = 21/10
f. = 1/10 -7/9 = -61/90
A = -4/15 + 7/2 = 97/30
B = -28/15 - 7/10 = -77/30
C = 13/7 + 2/7 × 5 = 13/7 + 10/7 = 23/7
Explications étape par étape:
Le signe "/" compte comme le trait de fraction.
