简便运算311/2*2/3+512/3+713/4*4/7对不起啊亲是31又1/2*2/3+51又2/3+71又3/4*4/7
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![简便运算311/2*2/3+512/3+713/4*4/7对不起啊亲是31又1/2*2/3+51又2/3+71又3/4*4/7](/uploads/image/z/7100515-19-5.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97311%2F2%2A2%2F3%2B512%2F3%2B713%2F4%2A4%2F7%E5%AF%B9%E4%B8%8D%E8%B5%B7%E5%95%8A%E4%BA%B2%E6%98%AF31%E5%8F%881%2F2%2A2%2F3%2B51%E5%8F%882%2F3%2B71%E5%8F%883%2F4%2A4%2F7)
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简便运算311/2*2/3+512/3+713/4*4/7对不起啊亲是31又1/2*2/3+51又2/3+71又3/4*4/7
简便运算311/2*2/3+512/3+713/4*4/7
对不起啊亲
是
31又1/2*2/3+51又2/3+71又3/4*4/7
简便运算311/2*2/3+512/3+713/4*4/7对不起啊亲是31又1/2*2/3+51又2/3+71又3/4*4/7
31又1/2*2/3+51又2/3+71又3/4*4/7
=63/2*2/3+51又2/3+287/4*4/7
=63/3+155/3+41
=(63+155)/3+41
=218/3+41
=72又2/3+41
=113又2/3
311/2*2/3+512/3+713/4*4/7
=311/3+512/3+713/7
=(311+512)/3+101又6/7
=274又1/3+101又6/7
=376又4/21
原式
=(311+512)/3+713/7
=823/3+713/7
=7880/21
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