(113 1/111)*1/112用最简便的方法怎么算?

(113+1/111)x1/112
=(112+1+1/111)x1/112
=(112+112/111)x1/112
=112x1/112+112/111x1/112
=1+1/111
=1又111分之1
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知识点延伸
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一般要求用简便方法计算的题目都有特殊点，只要发