Odpowiedź:
11. 12. 1/10, 3/10, 7/10, 9/10
8/16=1/2 13.a)20/24=5/6
12/18=2/3 b)9/24=3/8 16/24=2/3
24/64=3/8 c)14/168=2/24=1/12 12/168=2/28=1/14
50/200=1/4
42/60=7/10 14.
45/75=3/5 a)20/100=1/5 75/100=15/20=3/4
12/60=1/5 b)250/1000=1/4 800/1000=4/5
28/70=2/5 c)35/100=7/20 600/1000=3/5
d)650/1000=65/100=13/20 40/1000=4/100=1/25
Szczegółowe wyjaśnienie:
Zad 11:
a) 4/12 = 2/6 = 1/3
b) 8/16 = 4/8 = 2/4 = 1/2
c) 12/14 = 6/7
d) 24/64 = 12/32 = 6/16 = 3/8
e) 50/200 = 25/100 = 5/20 = 1/4
f) 42/60 = 21/30 = 7/10
g) 45/75 = 9/15 = 3/5
h) 12/60 = 6/30 = 3/15 = 1/5
i) 28/10 = 14/5
Zad 12:
1/10 3/10 7/10 9/10
Zad 13:
a) 20 min: 20/60 = 1/3
b) 9h: 9/24 = 3/8 16h: 16/24 = 2/3
c) 14h: 14/168 = 1/12 12h: 12/168 = 1/14
Zad 14:
a) 20cm: 20/100 = 1/5 75cm: 75/100 = 3/4
b) 250m: 250/1000 = 1/4 800m: 800/1000 = 4/5
c) 35dag: 35/100 = 7/20 600g: 600/1000 = 3/5
d) 650kg: 650/1000 = 15/20 40kg: 40/1000 = 1/250