Odpowiedź:
1. a)1 2/3 = 5/3
5/3+3/4 = 29/12 = 2 5/12
b) 1 3/5 = 8/5
8/5 - 3/10 = 13/10 = 1 3/10
c) 1 2/7 = 9/7
3 1/3 = 10/3
9/7 * 10/3 = 90/21 = 30/7 = 4 2/7
d) 5 1/5 = 26/5
1 6/7 = 13/7
26/5:13/7=26/5 * 7/13 = 182/65 = 14/5 = 2 4/5
2. a) 1,5 = 1 5/10 = 15/10 = 3/2
2 1/3 = 7/3
3/2+7/3 = 9+14/6 = 23/6 = 3 5/6
b)4 1/5 = 21/5
2,7 = 2 7/10 = 27/10
21/5 - 27/10 = 42-27/10 = 15/10 = 3/2 = 1 1/2
c) 1 3/4 = 7/4
0,2 = 2/10
7/4:2/10=7/4*10/2 = 70/8 = 35/4 = 8 3/4
