(﹣370)×(﹣0.25)+0.25×24.5+(﹣5.5)×(﹣0.25)(
=0.25×(370+24.5+5.5)
=0.25×400
=100
(﹣370)×(﹣0.25)+0.25×24.5+(﹣5.5)×(﹣0.25)(注:简便方法)
(﹣370)×(﹣0.25)+0.25×24.5+(﹣5.5)×(﹣0.25)(注:简便方法)
数学人气:500 ℃时间:2019-10-23 07:39:56
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