Question

agora este por favor...

Answer 1

1
a 5/8
b  2/8
c 7/8
d 1/8
2
a 3/5
b 3/6
c 3/8 + 4/8= 7/8
d 3/6-1/6=2/6
3
com colegas
4
a 9/10
b 4/7
c 3/5
d 8/9