5/6与1/18的和乘以2/3与1/6的差,积是多少? 列算式. 急~~~~~~~~~~~~~~~~~~~~~~~快.

问题描述:

5/6与1/18的和乘以2/3与1/6的差,积是多少? 列算式. 急~~~~~~~~~~~~~~~~~~~~~~~快.

(5/6+1/18)×(2/3-1/6)
=8/9×1/2
=4/9