Odpowiedź:
zadanie 59
a) 3 i 3/5 + 6/10 = 3 i 6/10 + 6/10 = 3 i 12/10 = 4 i 2/10 = 4 i 1/5
b) 1/7 + 5 i 6/21 = 3/21 + 5 i 6/21 = 5 i 9/21 = 5 i 3/7
c) 1 i 5/6 + 3/4 = 1 i 10/12 + 9/12 = 1 i 19/12 = 2 i 7/12
d) 3 i 4/5 + 2 i 5/6 = 3 i 24/30 + 2 i 25/30 = 5 i 49/30 = 6 i 19/30
e) 2 i 5/9 + 3 i 1/4 = 2 i 20/36 + 3 i 9/36 = 5 i 29/36
f) 3 i 5/6 + 2 i 3/8 = 3 i 20/24 + 2 i 9/24 = 5 i 29/24 = 6 i 5/24
zadanie 60
a)
3 i 1/6 - 1/4 = 3 i 2/12 - 3/12 = 2 i 14/12 - 3/12 = 2 i 11/12
b)
2 i 4/5 - 4/7 = 2 i 28/35 - 20/35 = 2 i 8/35
c)
3 i 5/11 - 1/2 = 3 i 10/22 - 11/22 = 2 i 32/22 - 11/22 = 2 i 21/22
d)
4 i 2/5 - 1 i 7/15 = 4 i 6/15 - 1 i 7/15 = 3 i 21/15 - 1 i 7/15 = 2 i 14/15
e)
3 i 5/8 - 2 i 5/6 = 3 i 15/24 - 2 i 20/24 = 2 i 39/24 - 2 i 20/24 = 19/24
f)
3 i 5/6 - 2 i 4/9 = 3 i 15/18 - 2 i 8/18 = 1 i 7/18
zadanie 61
a)
3 5/7 + 2 4/5 + 6 1/7 - 3= 3 25/35 + 2 28/35 + 6 5/35 - 3= 11 58/35 - 3=12 23/35 - 3 = 9 23/35
b)
10 1/4 - 2 1/10 + 1/5 + 1 1/2= 10 5/20 - 2 2/20 + 4/20 + 1 10/20= 9 17/20
c)
7 1/6 - 2 2/3 + 1 7/9 - 4 1/3= 7 3/18 - 2 12/18 + 1 14/18 - 4 6/18= 1 17/18
