Question

Sa se calculeze : 1/2+1/3+1/4+1/6 si 1-1/2- 1/3 si 3/4-1/7 si 10-1/10​

Answer 1

Răspuns:

1/2 + 1/3 + 1/4 + 1/6 = 6/12 + 4/12 + 3/12 + 2/12 =

= (6 + 4 + 3 + 2) / 12 = 15 / 12 = 5/4 sau = 1 + 1/4

1 - 1/2 - 1/3 = 6/6 - 3/6 - 2/6 = (6 - 3 - 2) / 6 = 1/6

3/4 - 1/7 = 21/28 - 4/28 = (21 - 4) / 28 = 17/28

10 - 1/10 = 100/10 - 1/10 = (100 - 1) / 10 = 99/10  sau = 9 + 9/10