1) A=l²= 12²= 144m²
1ar=100m²
144m²=1,44ari
A=1,44ari
2)a)2,85hm= 285m
212cm=2,12m
285+0,15+2,12=287,27m
b)15dg=1,5g
3dag=30g
1,3dag=13g
1,5+250+30-1,3= 281,5 -1,3= 280,2g
c)7200dl=720l
1,5hl=150l
0,12dal=1,2l
720+150-1,2= 870-1,2= 868,8 l
d)1h 20min= 60 min +20min= 80min= 4800sec
35min 20 sec= 2100sec +20sec= 2120 sec
4800-2120=2680sec
3)a15,152m³= 15152dm³ = 0,015152dam³