Răspuns :
1/8 + 2/3 - 1/4 - 2/3 =
= 1/8 - 1/4 + 0 =
= (1 - 2)/8 =
= - 1/8
1 / 8 - ( 2 / - 3 ) - 1 / 4 - ( - 2 / - 3 ) = - 1 / 8
= 1 / 8 + 2 / 3 - 1 / 4 - 2 / 3 =
= ( 1 / 8 - 1 / 4 ) + 2 / 3 - 2 / 3 =
= 1 / 8 - 2 / 8 + 0 =
= - 1 / 8
1/8 + 2/3 - 1/4 - 2/3 =
= 1/8 - 1/4 + 0 =
= (1 - 2)/8 =
= - 1/8
1 / 8 - ( 2 / - 3 ) - 1 / 4 - ( - 2 / - 3 ) = - 1 / 8
= 1 / 8 + 2 / 3 - 1 / 4 - 2 / 3 =
= ( 1 / 8 - 1 / 4 ) + 2 / 3 - 2 / 3 =
= 1 / 8 - 2 / 8 + 0 =
= - 1 / 8