去括号求解即可:原式=1080/9/3=120/3=40 望采纳

=1080÷9÷3=120÷3=40

1080÷(9*3)=1080÷9÷3=120÷3=40

先除9再除3

1080/9*3 =1080/【9/3】 =1080/3 =360

1080÷19*3=1080*3÷19=3240÷19=3240/19

=1080/9/3 =120/3 =4

原式=1080/9*1080/3 =120*360 =43200

5/6x4/9÷10/3+7/3 =5/6x4/9x3/10+7/3 =(5x4x3)/(6x9x10)+7/3 分子分母约分可得: =1/9+7/3 通分得: =1/9+21/9 =22/9 约分是分式约分,把一个分数的分子、分母同时除以公因数,分数的值不变.通分:根据分数(式)的基本性质,把几个异分母分数(式)化成与原来分数(式)相等的同分母的分数(式)的过程.

900÷3=100x9÷3=100x3=300