Odpowiedź:
Szczegółowe wyjaśnienie:
b) 1,4/(2 2/3 - 1 1/2)*6 = 1,4/(8/3 - 3/2)*6 = 1,4/(16/6 - 9/6)*6 = 1,4/(7/6)*6 =
1,4/7 = 14/10 : 7 = 14/10 * 1/7 = 2/10 = 1/5
c) [2/3 + 1/2 - 0,5]/[0,2 - 0,8* 1/8] = [2/3 + 1/2 - 1/2]/[1/5 - 4/5* 1/8] =
= (2/3)/[1/5 - 1/10] = (2/3)/[2/10 - 1/10] = 2/3 : 1/10 = 2/3 * 10 = 20/3 = 6 2/3
