10 ha -40000m2=….are

Ha = hm²    are = dam²
1 ha = 100 are
10 ha = 10 x 100 = 1000 are

1 m² = 100 are²
40.000 m² = 40.000 ÷ 100 = 400 are
   1000 – 400 = 600 are

Ha = hm²    are = dam²
1 ha = 100 are
10 ha = 10 x 100 = 1000 are

1 m² = 100 are²
40.000 m² = 40.000 ÷ 100 = 400 are
   1000 – 400 = 600 are