3/a) 35/55 = 7x5/11x5 =7/11
b) 72/135 = 8x9/15x9 = 8/15
c) 75/24 = 25x3/8x3 = 25/8
d) 99/22 = 9x11/2x9 = 11/2
e) 34/51 = 2x17/3x17 = 2/3
4/ par 2:
a) 6/10 = 6:2/10:2 = 3/5
b) 10/14 = 10:2/14:2 = 5/7
c) 14/12 = 14:3/12:2 = 7/6
d) 18/16 = 9:2/8:2 = 9/8
Par 3:
a) 9/12 = 9:3/12:3 = 3/4
b) 27/30 = 27:3/30:3 = 9/10
c) 3/6 = 3:3/6:3 = 1/2
d) 15/18 = 15:3/18:3 = 5/6
Par 5:
a) 10/25 = 10:5/25:5 = 2/5
b) 55/100 = 55:5/100:5 = 11/20
c) 45/35 = 9:5/7:5 = 9/7
d) 15/40= 15:5/40:5 = 3/8
Voilà !!
