zdanie 2
a) 7 - 5/9= 6 4/9
b) 3 1/7 - 1 3/4 = 3 4/28 - 1 7/28 = 1 25/28
c) 3 5/12 - 2 2/9 = 3 15/36 - 2 8/36 = 1 7/36
zadanie 3
a) 5 * 4 2/3 = 5 * 14/3 = 70/3 = 23 1/3
b) 15/21 * 3/25 = 3/7 * 1/5 = 3/35
c) 1 3/4 * 2 2/7 = 7/4 * 16/7 = 4/1 = 4
zadanie 4
a) 5/12 : 3 = 5/12 * 1/3 = 5/36
b) 21/32 : 7/8 = 21/32 * 8/7 = 3/4 * 1/1 = 3/4
c) 2 3/14 : 1 10/21 = 31/14 : 31/10 = 31/14 * 10/31 = 1/7 * 5/1 = 5/7
licze na korone i dziekuje<33
