62.17cm - 28.9cm =	cm
912 ÷ 3 =
17 × 3 =
410.30 - 68.55 =
15.135 + 8.251 =
9.634 - 3.415 =
684 × 0.5 =
13.7kg + 16.5kg =	kg
43.2m - 12.7m =	m
34.6cm + 12.05cm =	cm