Explicație pas cu pas:
1 + 5 / 6 - 1 2 / 3 =
= 1 + 5 / 6 - ( 1 x 3 + 2 ) / 3
= 1 + 5 / 6 - ( 3 + 2 ) / 3
= 1 + 5 / 6 - 5 / 3
= 6 / 6 + 5 / 6 - 10 / 6
= 11 / 6 - 10 / 6
= 1 / 6
6 1 / 4 + 3 / 8 + 1 / 12 =
= ( 6 x 4 + 1 ) / 4 + 3 / 8 + 1 / 12
= ( 24 + 1 ) / 4 + 3 / 8 + 1 / 12
= 25 / 4 + 3 / 8 + 1 / 12
= 150 / 24 + 9 / 24 + 2 / 24
= 159 / 24 + 2 / 24
= 161 / 24