235*137/234+137*235/234怎么算简便

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235*137/234+137*235/234怎么算简便
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235*137/234+137*235/234怎么算简便
235*137/234+137*235/234怎么算简便

235*137/234+137*235/234怎么算简便
235*137/234+137*235/234
=235×137/234+235×137/234
=(234+1)×137/234×2
=234×137/234×2+1×137/234×2
=137×2+274/234
=274+274/234
=275又20/117
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235*137/234+137*235/234
=(137+137)*235/234
=274*(1+1/234)
=274+274/234
=275又20/117

235×137/234+137×235/234
=235×137/234+235×137/234
=(234+1)×137/234×2
=234×2×137/234+1×137/234×2
=274+137/117
=275又20/117