a) 2/3 din 15 = 2/3 * 15 = 2 * 5 = 10
b) 6/7 * 42 = 6 * 6 = 36
c) 11/12 * 144 = 11 * 12 = 132
d) 2/9 * 81 = 2 * 9 = 18
e) 2 si 3/10 * 500 m = 23/10 * 500 m = 23 * 50 m = 1150 m
f) 5 si 1/2 * 60 h = 11/2 * 60 h = 330 h
g) 3/13 * 130 kg = 3 * 10 kg = 30 kg
h) 4/5 * 20 t = 4 * 4 t = 16 t
i) 7/3 * 21/49 = 1
j) 5/9 * 81/25 = 9/5
k) 7/8 * 324/35 = 81/5
l) 23/100 * 700/46 = 7/2
m) 51/100 * 3500/17 = 3 * 35 = 105
n) 3 si 1/3 * 7/20 = 7/6
o) 5/14 * 2 si 4/8 = 5/14 * 14/5 = 1
p) 5 si 1/4 din 3 si 2/3 = 21/4 * 11/3 = 77/4
toate sunt simplificate
