Respostas

2014-08-24T12:22:25-03:00
2/8 DE 20

20/8 =2,5
2.5 * 2=5
2014-08-24T12:30:07-03:00
2/8 × 20/1
20 × 2 = 40
8 × 1 = 8
40/8
SImplificando daria:
40 ÷ 8 = 5
8 ÷ 8 = 1
5/1 = 5