Question

calcule : 3/4 + 5/6 - 1/2 =

Answer 1

Calcule : 3/4 + 5/6 - 1/2


3 + 5 - 1    mmc = 12
4    6    2

9+10-6
   12

13
12

Answer 2

Fazendo o M.M.C dos denominadores, temos

4    6   2 | 2
2    3   1 | 2
1    3   1 | 3
1    1   1

2 * 2 * 3 = 12

= {[(12/4) * 3] + [(12/6) * 5] - [(12/2) * 1]} / 12
= (3 * 3 + 2 * 5 - 6 * 1) / 12
= (9 + 10 - 6) / 12
= (19 - 6) / 12
= 13/12