Odpowiedź:
zad 1
a)
3/4 * 4 = 3 * 1 = 3
b)
2/7 * 7 = 2 * 1 = 2
c)
10 * 1/5 = 2 * 1 = 2
d)
1/8 * 3 = 3/8
e)
2 * 3/5 = 6/5 = 1 1/5
f)
6/7 : 2 = 6/7 * 1/2 = 6/14 = 3/7
g)
8/9 : 4 = 8/9 * 1/4 = 2/9 * 1 = 2/9
h)
6/5 : 3 = 6/5 * 1/3 = 2/5 * 1 = 2/5
i)
6 : 5 = 6/5 = 1 1/5
j)
3 : 9 = 3/9 = 1/3
zad 2
a)
4/9 * 3/4 = 1/3 * 1 = 1/3
b)
5/8 : 7/12 = 5/8 * 12/7 = 5/2 * 3/7 = 15/14 = 1 1/14
c)
7/8 * 24/33 = 7 * 3/33 = 7 * 1/11 = 7/11
d)
1 1/8 * 4/15 = 9/8 * 4/15 = 3/2 * 1/5 = 3/10
e)
2 3/5 : 5 = 13/5 * 1/5 = 13/25
f)
1 5/7 : 6 = 12/7 * 1/6 = 2/7 * 1 = 2/7
g)
6 1/2 : 3 3/4 = 13/2 : 15/4 = 13/2 * 4/15 = 13 * 2/15 = 26/15 = 1 11/15
h)
7 1/3 : 2 2/5 = 22/3 : 12/5 = 22/3 * 5/12 = 11/3 * 5/6 = 55/18 = 3 1/18
i)
2 * 13 * 4/8 = 13 * 4/4 = 13 * 1 = 13
j)
8 3/4 * 4/7 * 3 = 35/4 * 4/7 * 3 = 35 * 1/7 * 3 = 105/7 = 15
k)
2 1/7 * 7 * 2 2/5 = 15/7 * 7 * 12/5 = 15 * 12/5 = 3 * 12 = 36
l)
4 * 15 * 9/12 = 15 * 9/3 = 5 * 9 = 27