Odpowiedzi

2010-04-14T13:48:26+02:00
A) 10% z 50 - 5
20/100 * 50 = 10
b) 10% z 120 - 12
5/100 * 120 = 6
c) 10% z 60 - 6
30/100 * 60 = 18
d) 10% z 30 - 3
110/100 * 30 = 33
e) 10% z 70 - 7
150/100 * 70 = 105
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2010-04-14T13:50:35+02:00
A)
100% - 50
20% - x
100x = 50*20
100x = 1000 /:100
x=10

b)
100% - 120
5% - x
100x = 120 *5
100x = 600 / :100
x=6

c)
100% - 60
30% - x
100x = 30 * 60
100x = 1800 /:100
x=18

d)
100% - 30
110% - x
100x = 30*110
100x = 3300 / :100
x = 33

e)
100% - 70
150% - x
100x = 150*70
100x = 10500 / :100
x=105
2010-04-14T13:52:49+02:00
20% * 50= 20/100 * 50= 1000/ 100= (skracamy zera) =10
5% * 120= 5/100 * 120= 600/ 100= 6
30% * 60= 30/100 *60 = 1800/100=18
110% *30= 110/100 *30= 33
150% * 70= 150/100* 70= 105
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