Réponse :
a. (4*3*5)/(2*5*7) = 60/70 = 6/7
b. (8*3*7)/(28*5*6) = 168/840 = 1/5
c. (9*16*25)/(18*5*10) = 4500/900 = 5
d. -3/2 * 6/5 * -5/-21 = 90/210 = 3/7
e. 3/35 * -12/15 * 7/-6 = 252/1575 = 28/175
EXERCICE 2
1. pour 5
5*(-2/5) = -10/5 = -2 + 3/2 = -(4+3)/2 = 7/2 * 2 = 14/2 = 7
2. 2/3
2/3*(-2/5) = -4/15 + 3/2 = -8/30 + 45/30 = 37/30 = 37/15
3. -5/6
-5/6*(-2/5) = 10/30 = 1/3 + 3/2 = 3/6 + 9/6 = 12/6 = 2 * 2 = 4
Explications étape par étape :
