Răspuns:
760 mm
400 dm
500 dam
2300 dm
2 m
Explicație pas cu pas:
a. 19 cm x 4 = 76 cm
76 cm = 76 x 10 mm = 760 mm
b. 280 m : 7 = 40 m
40 m = 40 x 10 dm = 400 dm
c. 2 km + 30 hm = 2 km + (30 : 10 km) = 2 km + 3 km = 5 km
5 km = 5 x 100 dam = 500 dam
d. 30 dam - 70 m = 30 dam - (70 : 10 dam) = 30 dam - 7 dam = 23 dam
23 dam = 23 x 100 dm = 2300 dm
e. 10 dm x 2 = 20 dm
20 dm = 20 : 10 m = 2 m
Sa speram ca nu am gresit! :>
