Bonsoir,
a. 2/3 * 3/4 = 1/5 * 3/2 = 3/10
b. 7/11 * 9/2 =7*9/11*2=63/22
c. 6/19 * 15/7 = 6*15/19*7= 90/133
d. 1/2 * 1/3 * 1/4 * 1/5 = 1*1*1*1/2*3*4*5 = 1/120
e. 3/8 * 7/10 * 1/5 = 3*7*1/8*10*5 = 21/400
*= multiplier
/= sur
Voilà bonne soirée : )
