Odpowiedź:
Szczegółowe wyjaśnienie:
a) (3 1/2 + 1 1/2)* 3/5 = 5 * 3/5 = 3
b) (2 2/3 - 4/5) *1 3/7 = (8/3 - 4/5) * 10/7 = (40/15 - 12/15) * 10/7 =
= 28/15 * 10/7 = (28*10)/(15*7) = 4*2/3= 8/3 = 2 2/3
c) (15 2/3 - 7 1/2) : 1 1/2 = (47/3 - 15/2) : 3/2 = (94/6 - 45/6) * 2/3 =
49/6 * 2/3 = 49/9 = 5 4/9
d) 2 * (1/3)² + 3*(1/2)³ = 2* 1/9 + 3 * 1/8 = 2/9 + 3/8 =16/72 + 27/72 = 43/72
e) 4 1/2 * 1 1/3 - 2 2/5 * 5/7 = 9/2 * 4/3 - 12/5 * 5/7 = 36/6 - 60/35 =
= 6 - 12/7 = 6 - 1 5/7 = 4 2/7
f) 1 2/3 - 5/6 + 2 1/10 : 1 6/15 = 5/3 - 5/6 + 21/10 : 21/15 =
10/6 - 5/6 + 21/10 * 15/21 = 5/6 + (21*15)/(10*21) = 5/6 + 3/2 = 5/6 + 9/6 =
= 14/6 = 7/3 = 2 1/3
g) (5/8 + 1/2) : 1 1/2 - 1/3 = (5/8 + 4/8) : 3/2 - 1/3 = 9/8 * 2/3 - 1/3 =
18/24 - 1/3 = 3/4 - 1/3 = 9/12 - 4/12 = 5/12
