第1个回答 2019-10-01
这是一道利用乘法分配律来进行简算的题目,首先将7/4÷9/5转化为7/4×5/9,然后按照分配律简算。
5/9x11/4-7/4÷9/5
=5/9x11/4-7/4×5/9
=5/9×(11/4-7/4)
=5/9×1
=5/9
第2个回答 2019-09-29
答:原式=5/9×(11/4-7/4)
=5/9×4/4
=5/9
第3个回答 2019-09-28
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a50f4bfbfbedab6451afebdff836afc378311ecb?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
如图所示
第4个回答 2019-09-29
5/9×11/4-7/4÷9/5
=5/9×11/4-7/4×5/9
=5/9×(11/4-7/4)
=5/9×1
=5/9