oblicz a)20% liczby 450 b)90% liczby 80 c)15% liczby 140 d)140% liczby 200
a) 20% x 450 = 90
b) 90% x 80 = 72
c) 15% x 140 = 21
d) 140% x 200 = 280
metoda na proporcje najlepsza :D
a)450 - 100 %
x - 20%
Jedziemy na krzyż : 450 * 20 % / 100 =90 :)
b) 80-100%
x - 90%
80*90%/100% =72
c)140-100%
x - 15%
140*15%/100%=21
d)200-100%
x - 140%
200*140%/100=280
Licze na naj :)
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a) 20% x 450 = 90
b) 90% x 80 = 72
c) 15% x 140 = 21
d) 140% x 200 = 280
metoda na proporcje najlepsza :D
a)450 - 100 %
x - 20%
Jedziemy na krzyż : 450 * 20 % / 100 =90 :)
b) 80-100%
x - 90%
80*90%/100% =72
c)140-100%
x - 15%
140*15%/100%=21
d)200-100%
x - 140%
200*140%/100=280
Licze na naj :)