1、8/9的倒数与5/6的积是多少?
1/(8/9)*(5/6)
=(9/8)*(5/6)
=15/16
2、100的倒数的1/9是多少?
(1/100)*(1/9)
=1/900
3、1.4加上它的倒数,再减去5/7,结果是多少?
(1.4+1/1.4)-5/7
=1.4+5/7-5/7
=1.4