Odpowiedź:
4.
a) 7/12 * 6/7 = 1/2 * 1/1 = 1/2
b) 1 2/3 * 5 = 5/3 * 5 = 25/3 = 8 1/3
c) 2 1/5 * 1 2/11 = 11/5 * 13/11 = 1/5 * 13/1 = 13/5 = 2 3/5
d) 3 5/24 * 1 43/77 = 77/24 * 120/77 = 1/1 * 5/1 = 5
e) 3/5 : 12/10 = 3/5 * 10/12 = 30/60 = 3/6 = 1/2
f) 1 4/9 : 2/9 = 13/9 : 2/9 = 13/9 * 9/2 = 13/1 * 1/2 = 13/2 = 6 1/2
g) 14 : 3 1/2 = 14 : 7/2 = 14 * 2/7 = 28/7 = 4
h) 2 7/9 : 25 = 25/9 : 25/1 = 25/9 * 1/25 = 1/9 * 1/1 = 1/9
Szczegółowe wyjaśnienie:
