Răspuns:
40 dm - 30 dm = 10 dm = 1 m
123 cm · 3 = 369 cm
1 dam + 0 dam = 1 dam = 10 m
63 dm ÷ 7 = 9 dm
40 cm + 60 cm = 100 cm = 1 m
35 mm · 10 = 350 mm
330 mm + 670 mm = 1000 mm = 1 m
6 km · 9 + 267 km - 8 km · 4 = 54 km + 267 km - 8 km · 4 = 54 km + 267 km - 32 km = 321 km - 32 km = 289 km
