Răspuns:
800 cm = 80 dm = 8000 mm
9 km = 90 hm = 900 dam
2.Calculează:
a) 180 dam + 320 dam = 5000 m
1000 m - 50 dam = 50 dam
6 x 250 dam = 1500 dam = 150 hm
b) 4 m + 32 dm = 72 dm
42 m - 30 dm = 39 m
6 x 220 dm = 1320 dm = 132 m
c) 17 dm + 19 cm = 189 cm
415 dm - 70 cm = 408 dm
80 mm : 2 = 40 mm = 0,04 m