Question

Oblicz;

a)15% z 28zł

b) 140% z 8kg

c)1,2% z 20 zł

d)13% z 25 cm

e)4,5% z 480 l

f) 270% z 2,5km

g) 3 promile z 1500kg

h) 1,5 promili z 4 t

Answer 1

15% z 28=0,15×28=42

140%z 8kg=1,4×8=11,2kg

1,2% z 20zł=0,012×20=0,24zł

13% z 25cm=0,13×25=3,25cm

4,5% z 480l=0,045×480=21,6l

270% z 2,5km=2,7×2,5km=6,75km

3%₀z 1500kg=0,003×1500=4,5kg

1,5%₀ z 4t=0,0015×4=0,006tony

Answer 2

A) 10% z 28zł to 2,8zl = 5% z 28 = 1,4zł 2.8 + 1,4 = 4,2

15% z 28zl = 4,2zł

B)10% z 8kg= 0.8kg * 4 =3.2kg 8kg+3.2kg =11.2 kg

140% z 8kg = 11.2kg

C)1.2% z 20zł = 1% z 20zł = 20gr : 5 =4gr. 20gr + 4gr = 24gr

1.2% z 20= 24gr

D)13% z 25cm = 1% z 25cm = 0.25cm * 13 = 3.25cm

13% z 25cm = 3.25cm

E)4.5% z 480 I = 1% z 480 = 4.8 I * 4 + ( 4.8 I : 2) = 19.2 + 2.4 = 21.6 I

4.5% z 480 = 21.6 I

F)270% z 2.5km = 10% z 2.5km = 0.25km * 27 = 6.75km

270% z 2.5km = 6.75km

G)3 promile z 1500kg=0,003*1500kg = 4,5kg

H)1.5 promili z 4t = 0,0015*4000kg = 6kg