Odpowiedź:
Zadanie 1
7/8 - 2/8 = 5/8
Odp. D
Zadanie 2
a) 2/3 - 1/3 = 1/3
b) 6/7 - 2/7 = 4/7
c) 9/13 - 5/13 = 4/13
d) 17/29 - 9/29 = 8/29
Zadanie 3
a) 7/8 - 1/8 = 6/8 = 3/4
b) 11/12 - 3/12 = 8/12 = 2/3
c) 13/21 - 10/21 = 3/21 = 1/7
d) 31/33 - 20/33 = 11/33 = 1/3
Zadanie 4
a)
5 i 4/7 - 2/7 = 5 i 2/7
7 i 6/9 - 4/9 = 7 i 2/9
5 i 4/7 - 3/7 = 5 i 1/7
7 i 6/9 - 4/9 = 7 i 2/9
b)
4 i 2/7 - 3 = 1 i 2/7
9 i 6/17 - 5 = 4 i 6/17
15 i 4/11 - 14 = 1 i 4/11
19 i 17/19 - 17 = 2 i 17/19
c)
5 i 4/7 - 2 i 2/7 = 3 i 2/7
9 i 6/11 - 6 i 4/11 = 3 i 2/11
12 i 8/15 - 12 i 4/15 = 4/15
27 i 16/19 - 1 i 3/19 = 26 i 13/19
Zadanie 5
a) 5 i 7/8 - 1 i 3/8 = 4 i 4/8 = 4 i 1/2
b) 9 i 11/12 - 3 i 5/12 = 6 i 6/12 = 6 i 1/2
c) 14 i 9/16 - 11 i 5/16 = 3 i 4/16 = 3 i 1/4
d) 25 i 16/27 - 11 i 13/27 = 14 i 3/27 = 14 i 1/9
