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a) 4
b)8
c)20
d)
2.
900
a) o,5% wynosi2
0,5% - 2
100% - x
0,5x=200 /:0,5
x=400
b)1,5% wynosi 12
1,5% - 12
100% - x
1,5x=1200 /:1,5
x=800
c) 0,2 wynosi 4
0,2% - 4
100% - x
0,2x=400 /:0,2
x=2000
d) 2,5% wynosi 3
2,5% - 3
100% - x
2,5x=300 /:2,5
x=120
2.Jaka to liczba której:
75% - 600
100% - x
75x=60000 /:75
x=800
100% - x
x=(12*100) : 5
x = 40
b)
1,5% - 12
100% - x
x = (100*12) : 1,5
x = 133,(3)
c)
0,2% - 4
100% - x
x = (4*100) o,2
x = 2000
d)
2,5% - 3
100% - x
x = (100*3) : 2,5
x = 120
2.
75% - 600
100% - x
x = (600 * 100): 75
x = 800