Răspuns:
1
Explicație pas cu pas:
1) 0,02km=0,2hm=2dam
O,3hm=3dam
250m = 25 dam
2+3+25=30dam
2)1,02hm=12dam
9,7km=97hm=970dam
1200dm=120m=12dam
12+970+12=......dam
3)4000 cm =400dm =40m =4dam
6,25hm=62,5dam
1,2m =0,12dam
12 dm =1,2m=0,12dam
4+62,5-0,12+0,12=......
4)8,2hm= 82dam
43m=4,3dam
523dm =52,3m =5,23dam
82+4,3-5,23+45=.......