(780-724)×15怎样简便运算
问题描述:
(780-724)×15怎样简便运算
答
(780-724)×15
=56x15
=7x4x15
=7x60
=420
(780-724)×15怎样简便运算
(780-724)×15
=56x15
=7x4x15
=7x60
=420