8.
a) 1 1/3= 4/3
1 1/5= 6/5
1 3/8= 11/8
2 1/4= 9/4
2 1/7= 15/7
b) 17/2= 8 1/2
19/3= 6 1/3
25/4= 6 1/4
36/9=4
40/7= 5 5/7
9.
a) 9 1/2
b) 5 7/17
c) 8 2/11
d) 10 8/10, po skróceniu 10 4/5
10. 7 7/10+ 2 9/10= 9 16/10= 10 6/10= 10 3/5
11.
a) 4- 2/7= 3 5/7
b) 6- 1 1/4= 4 3/4
c) 4 1/3- 1 2/3= 2 2/3
d) 5 2/9- 3 4/9= 1 7/9
