bonsoir pouvez-vous m'aider s'il vous plaît sur l'exercice n° 32 ?

bonsoir

a =  10/3-1/3 = 9/3 = 3

b = 7/4 -9/8 = 14/8 -9/8 = 5/8

c =(10/12+7/12)  x 3/5 = 17/12 x 3/5 = 17/20

d = 1/6 +50/15 = 1/6 +10/3 = 1/6+20/6 = 21/6 =7/2

e = (2/5-3/10) x 15/4 = (4/10-3/10) x15/4 = 1/10 x 15/4 = 15/40 = 3/8

f = 10/9 x 6/5 = 60/45 = 12/9 = 4/3