Question

Efectueaza :
75 dam +130km =? m
72 dam -140m =?m
570 m -1600 dm =?cm
21 km-18dam =?dm

Answer 1

75 dam + 130 km =
75 dam = 750 m
130 km = 130000 m
750 m + 130000 m =130750 m

72 dam - 140 m =
72 dam =720 m
720 m - 140 m = 580 m

570 m - 1600 dm =
570 m = 57000 cm
1600 dm = 16000 cm
57000 cm - 16000 cm = 41000 cm

21 km - 18 dam =
21 km = 210000 dm
18 dam = 1800 dm
210000 dm - 1800 dm = 208200 dm