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42.65cm - 21.09cm =	cm
618 ÷ 6 =
14 × 9 =
7.25 - 0.65 =
13.135 + 6.452 =
6.27 - 3.581 =
650 × ½ =
9.7kg + 7.21kg =	kg
15m - 8.05m =	m
18.4cm + 19.62cm =	cm