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
(324 1/7-810 1/6-486.5)×4.2
(324 1/7-810 1/6-486.5)×4.2
数学人气:944 ℃时间:2019-12-01 13:25:02
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