Răspuns:
20 m + 2 dam + 31 dm = ......... dm
20 m = 200 dm
2 dam = 200 dm
200 dm + 200 dm + 31 dm = 431 dm
36 cm + 120 mm - 2 dm =........ cm
120 mm = 12 cm
2 dm = 20 cm
36 cm + 12 cm - 20 cm =
48 cm - 20 cm =
28 cm
148 hm - 1 km + 240 dam + 50 m = ......dam
148 hm = 1 480 dam
1 km = 100 dam
50 m = 5 dam
1 480 dam - 100 dam + 240 dam + 5 dam =
1 380 dam + 240 dam + 5 dam =
1 620 dam + 5 dam =
1 625 dam