Răspuns:
a) 13 m + 548 cm = 1848 cm;
69 hm + 173 m = 7073 m;
59 km + 9 dam = 5909 dam;
b) 60 m – 468 cm = 2532 cm;
87 cm – 530 mm = 340 mm;
15 km – 23 dam = 1477 dam;
c) 4500 m – 320 dam = 130 dam;
7800 m – 49 hm = 29 hm;
5500 m – 5 km = 500 m.
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