Question

zamień jednostki: a)7,5m2= dm2 b)1200cm2= m2 c)420m2= a d)0,25ha= a e)2,5km2= a a to ary

Answer 1

a)7,5m2=750dm2

b)1200cm2=0,12m2

c)420m2=4,2a

d)0,25ha=25a

e)2,5km2=25000a

Answer 2

a) 1m2 = 1m * 1m = 10dm * 10dm = 100dm2

7,5m2= (7,5 * 100)dm2 = 750dm2

 

b) 1m2 = 1m * 1m = 100cm * 100cm = 10 000cm2

1200cm2= (1200 : 10 000) m2 = 0,12m2

 

c) 1a = 100m2

420m2=(420 : 100)a = 4,2a

 

d) 1ha = 100a

0,25ha= 0,25 * 100a = 25a

 

e) 1km2 = 100ha

2,5km2= 2,5 * 100ha = 250ha = 250 * 100a = 25 000a