Odpowiedź :
Szczegółowe wyjaśnienie:
c)
12 1/5 - (3 5/6 + 2 1/2) + (4 3/10 - 1 2/3) =
12 1/5 - (23/6 + 5/2) + (43/10 - 5/3) =
12 1/5 - (23/6 + 15/6) + (129/30 - 50/30) =
61/5 - 38/6 + 79/30 =
366/30 - 190/30 + 79/30 =
255/30 = 51/6 = 8 3/6 = 8 1/2
d)
2 5/8 + 6 - (3 1/3 - 1 3/4) + (7 - 3 7/12) =
21/8 + 6/1 - (10/3 - 7/4) + (7/1 - 43/12) =
21/8 + 6/1 - (40/12 - 21/4) + (84/12 - 43/12) =
21/8 + 6/1 - 19/12 + 41/12 =
63/24 + 144/24 - 38/24 + 82/24 =
251/24 = 10 11/24