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
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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

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