Răspuns :
a)(149/12 + 5/2 - 23/6 + 11/4) : (5/2 × 2/5 - 7/9) =
(149 + 30 - 46 + 33)/12 × 9/2 =
166/12 × 9/2 = 249/4 = 62 întregi 1/4
b)12/5 × 15/91 + 8/7 - 112/73 × (40/7 - 81/16) =
36/91 + 8/7 - 112/73 × (640 - 567)/112 =
36/91 + 8/7 - 112/73 × 73/112 =
36/91 + 8/7 - 1 =
(252 + 728 - 637)/637 =
343/637 =
7/13
(149 + 30 - 46 + 33)/12 × 9/2 =
166/12 × 9/2 = 249/4 = 62 întregi 1/4
b)12/5 × 15/91 + 8/7 - 112/73 × (40/7 - 81/16) =
36/91 + 8/7 - 112/73 × (640 - 567)/112 =
36/91 + 8/7 - 112/73 × 73/112 =
36/91 + 8/7 - 1 =
(252 + 728 - 637)/637 =
343/637 =
7/13