(324 1/7-810 1/6-486.5)×4.2

问题描述:

(324 1/7-810 1/6-486.5)×4.2

楼主.
将括号打开.
(324 1/7-810 1/6-486.5)×4.2
=3241/7*4.2-8101/6*4.2-486.5*4.2
=1944.6-5670.7-2043.3
=-5769.4