Răspuns:
Explicație pas cu pas:
76 km = 20 hm + ? hm
760 hm = 20 hm + ? hm
760 hm = 20 hm + 740 hm
________
81 dam = 410 m + ? m
810 m = 410 m + ? m
810 m = 410 m + 400 m
________
35 hm = 130 dam + ? dam
350 dam = 130 dam + ? dam
350 dam = 130 dam + 220 dam