第1个回答 2021-07-27
原式=6又6/7
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/267f9e2f070828387ad94d76a899a9014d08f1f8?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
第2个回答 2021-07-28
9又1/3+-2又1/3+-1/7
=9又1/3-2又1/3-1/7
=7-1/7
=49/7-1/7
=48/7
第3个回答 2021-07-28
9又1/3+-2又1/3+-1/7
=28/3-7/3-1/7
=196/27-49/27-3/27
=(196-49-3)/27
=144/27
=48/7
第4个回答 2021-07-28
9又1/3+-2又1/3+-1/7
=9又1/3-2又1/3-1/7
=7-1/7
=6又7/7-1/7
=6又6/7