Odpowiedź:
1.
7 4/5 * 1 2/3 + 2 * (-1/3) = 39/5 * 5/3 - 2/3 = 13 - 2/3 = 12 1/3
2.
-4 * [-4/3 * 9/16 - 1/5 * (- 5/2)] = -4(-3/4 + 1/2) = -4(-3/4 + 2/4) = -4 * (-1/4) = 1
3.
[(1/5 + 0,6) : 2 - 2 2/3] * 6 1/4 = [(0,2 + 0,6) : 2 - 2 2/3] * 25/4 =
= (0,8 : 2 - 2 2/3) * 25/4 = (0,4 - 2 2/3) * 25/4 = (2/5 - 2 2/3) * 25/4 =
= (6/15 - 2 10/15) * 25/4 = -2 4/15 * 25/4 = -34/15 * 25/4 = -17/3 * 5/2 = -85/6 = -14 1/6
Szczegółowe wyjaśnienie:
