简便运算：8×(-五分之二)-(-2)×(-九分之二)+8×(-五分之三)_数学解答

简便运算：8×(-五分之二)-(-2)×(-九分之二)+8×(-五分之三)

人气：464 ℃　时间：2019-08-20 09:12:48

解答

8*(-2/5)-(-2)*(-2/9)+8*(-3/5)
=-16/5-4/9-24/5
=(-16-24)/5-4/9
=-40/5-4/9
=-8-4/9
=-72/9-4/9
=-76/9