Question

3.6*31*5/2+43.9*6*2/5 怎么简便运算?

Answer 1

你好,我看了一下你发的题目,应该是打错了一些地方,比如6*2/5应该是6又2/5 ,31*5/2是31又2/5,这样才可以找到简便方法计算；

那么3.6*31又2/5+43.9*6又2/5

=3.6*31.4+43.9*6.4

=3.6*31.4+(31.4+12.5)*6.4

=3.6*31.4+31.4*6.4+12.5*6.4

=31.4*(3.6+6.4)+12.5*8*0.8

=31.4*10+100*0.8

=314+80

=394

楼主记得采纳哦