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From: Ken Ong <email@example.com> To: Teacher2Teacher Public Discussion Date: 2005031101:04:42 Subject: Subtracting using fingers My son can subtract 4 from 10 by opening up all the 10 fingers and closing up (subtract) 4 fingers and the remaining 6 fingers is the answer. But when he comes to subtracting 4 from 12, he has a problem as he only has 10 fingers. I think this may be a common problem. Anybody can help?
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