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a) 5/8 : 3 = 5/8 : 3/1 = 5/8 * 1/3 = 5/24
6 : 2 1/4 = 6/1 : 9/4 = 6/1 * 4/9 = 24/9 = 2 6/9 = 2 2/3
7 1/5 : 9 = 36/5 : 9/1 = 36/5 : 1 /9 = 4/5 * 1/1 = 4/5
b) 4 3/7 : 2/3 = 31/7 : 2/3 = 31/7 * 3/2 = 93/14 = 6 9/14
1 1/3 : 1 3/5 = 4/3 : 8/5 = 4/3 * 5/8 = 1/3 *5/2 = 5/6
19.
a) 2/3 masy 12 kg to 8 kg
b) 3/4 kwoty 60 zł to 45 zł
c) 4/5 objętości 25 litrów to 20 l
20.
a) 3/8 liczby 28 = 10,5
b) 2/3 liczby 3 3/4 = 2,5
c) 1 1/6 liczby 2 1/7 = 2,5