Zadanie 8.
Tuzin = 12
Mendel = 15
Kopa = 60
a)
60 = 100%
12 = x
12*100%=60x
1200%=60x /:60
20%=x
15 = 100%
12 = x
12*100%=15x
1200%=15x/:15
80%=x
Odp. Tuzin to 20% kopy i 80% mendla
b)
60 = 100%
15 = x
15*100%=60x
1500%=60x /:60
25% = x
12 = 100%
15 = x
15*100%=12x
1500%=12x /:12
125%=x
Odp. Mendel to 25% kopy i 125% tuzina
9.
1‰ = [tex]\frac1{1000}[/tex]
a)
1:2000 = 0,0005 = 0,5‰
Odp. 1zl to 0,05‰ kwoty 2000
b)
4l = 4000ml
5:4000 = 0,00125 = 1,25‰
Odp. 5ml to 1,25‰ objetosci 4l.
