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发表于 3-10-2013 21:01:29|来自:新加坡
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刚看一题P4 SA2的题, 有点象二试的题: John had some money. He paid $10 for 3 excercise books and 7 pencils. He wanted to buy another exercise book but was short of $0.40. If he were to buy one more pencil, he would still have $0.60 left.
a)How much did a pencil cost? b)How much money did John have at first?
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