Resposta:
1. a) 1/5
b) 3/6 = 1/2
c) 6/3 = 2/1 = 2
d) 15/10 = 3/2
e) 100/80 = 10/8 = 5/4
f) 48/72 = 6/9 = 2/3
2. a) 5m = 500cm
500/20 = 50/2 = 25
b) 0,5m = 50cm
10/50 = 1/5
c) 127/157
d) 2kg = 2000g
800/2000 = 8/20 = 2/5
3. numero acertos/numero total de questoes
16/20 = 4/5
