Completeaza pentru a obtine egalitati: 4 dm+....dm= 1 m; 80 hm +....hm = 10 km ,; 600 dam +...km= 9km; ...dm+.....cm=1 dam; 19 dam+...m=3 hm; 9 km-40....=500 dam; 700mm-....dm= 30....; ....km-140....=0 hm; ...dm-15 cm=2450 mm; 32...-....dam=1km;