1. Jaki procent kwadratu zamalowano na rysunku
a) 25 kratek - zamalowano 5 kratek
b) 25 kratek - zamalowano 13 kratek
c) 25 kratek - zamalowano 23 kratki
2. Oblicz:
10% liczby: a) 20 b) 42 c) 14 d) 6
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a)
25 - 100%
5 - x
5*100%
x=------------- = 20 %
25
b)
25 - 100%
13 - x
13*100%
x=--------------= 52 %
25
c)
25 - 100%
23 - x
23*100%
x=--------------- = 92 %
25
2.
a) 20 * 10 % = 20 * 0,1 = 2
b) 42*10% = 42*0,1 = 4,2
c)14*10%=14*0,1 = 1,4
d) 6*10%=6*0,1=0,6
Powinno być ok
1. to będzie B
2. 10% to będzie A