Odpowiedź:
Szczegółowe wyjaśnienie:
a) 2/3 x 1 4/5 + 2 1/2 = 2/3 x 9/5 + 2 1/2 = 1 1/5 + 2 1/2 = 1 2/10 + 2 5/10 = 3 7/10
b) [(1 2/10)2 + 1 1/6] x 3 = [(3/2 x 3/2) + 1 1/6] x 3 = [2 1/4 + 1 1/6] x 3 = [2 3/12 + 1 2/12] x 3 = 3 5/12 x 3 = 41/12 x 3/1 = 41/4 = 10 1/4
c)4 7/8 – 1 1/3 x 1 1/8 = 4 7/8 – 4/3 x 9/8 = 4 7/8 – 1 1/2 = 4 7/8 – 1 4/8 = 3 3/8