第1个回答 2013-01-29
如果是:5×6×7-2×3×4/5×6×7
=210-4/35
=206又35分之31
如果是:(5×6×7-2×3×4)/5×6×7
=6×(5×7-4)/5×6×7…………用6约分
=31/35……………………………35分之31
第2个回答 2013-01-29
是(5*6*7-2*3*4)/5*6*7 吗
如果是这个 分母提3,约分,分母提2,约分。
追问能给详细过程吗,O(∩_∩)O谢谢
追答![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/b3b7d0a20cf431adf2114e0c4a36acaf2fdd98c7?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
我刚才说错了
第3个回答 2013-01-29
(5*6*7-2*3*4)/5*6*7
=5x6x7/5x6x7-2x3x4/5x6x7
=1-2x3x4/5x6x7
=1-6x4/5x6x7
=1-4/5x7
=1-4/35
=31/35本回答被提问者采纳
第4个回答 2013-01-29
1-2*3*4/5*6*7=1-4/5*7=31/35