Răspuns :
6/12+9/12+10/12+6/12+3/12+2/12=
=36/12
=3
Sau alta rezolvare prin grupare termeni
2/2+4/4+6/6
=1+1+1
=3
=36/12
=3
Sau alta rezolvare prin grupare termeni
2/2+4/4+6/6
=1+1+1
=3
(1/2 + 3/4 + 5/6) + (1/2 + 1/4 + 1/6) =
(6/12 + 9/12 + 10/12) + (6/12 + 3/12 + 2/12) =
6/12 + 9/12 + 10/12 + 6/12 + 3/12 + 2/12 =
25/12 + 11/12 = 36/12 = 3