(240一210*15)x12简便计算
第1个回答 2017-06-26
(240一210*15)x12
=240x12-210x15x12
=30x3x12-30x7x15x12
=360x(3-105)
=360x(-102)
=360x(-100-2)
=-360x100-360x2
=-3600-720
=-4320本回答被网友采纳
=240x12-210x15x12
=30x3x12-30x7x15x12
=360x(3-105)
=360x(-102)
=360x(-100-2)
=-360x100-360x2
=-3600-720
=-4320本回答被网友采纳