Respostas

2013-11-13T01:43:50-02:00
3 x (-1/8) + 12 x (1/16)
-3/8 + 12/16
-6/16 + 12/16
6/16 (simplificando por 2)
3/8
2013-11-13T01:54:56-02:00
3 (- 1/2)³ - (- 12) (- 1/4)²
3 (- 1/8) + 12 * 1/16 =
- 3/8 + 12/16 = - 3/8 + 3/4 =
mmc (8,4) = 8
- 3 + 6
   8
3/8
Resposta: 3/8