1)9 4/21−4 11/14 =5 8/42- 33/42=4 50/42- 33/42=4 17/42
2)5 2/15+3 5/12=8 2/15+5/12=8 8/60+25/60=8 33/60
3)10- 6 2/9=9 9/9- 6 2/9=3 7/9
4)2 5/6+ 1 3/7= 3 35/42+ 18/42= 3 53/42= 4 11/42
5)1 2/3+ 1 1/6=2 4/6+ 1/6=2 5/6
6)5 5/33 - 4 7/22=1 5/33- 7/22=1 10/66- 21/66=76/66- 21/66=55/66=5/6
8 33/60; 4 17/42; 4 11/42; 3 7/9; 2 5/6; 5/6.
Б. И. З. Н. Е. С.