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2. Calculează: a) 13 dam + 170 dm = 9 km +15 m = 63 hm 1 300 cm = m b) 13 km + 400 dm = dam dm 23 hm-4 000 dm= dam m 63 hm-1 300 cm = m mm dm 18 dm-5 cm =[ c) 570 hm: 3 = km 64 000 m: 4 = hm 16 km x 3 = dam 18 dm - 50 cm = d) 16 x 15 dam = 70 dm:2= 165 000 cm: 3= 7 cm x 21 = mm 20 000 m: 5= m mm dam km​