如题所述
第1个回答 2020-06-02
简便运算
7.25*3.5-7.25*6.5
=7.25*(3.5-6.5)
=7.25*(-3)
=-21.75本回答被网友采纳
7.25*3.5-7.25*6.5
=7.25*(3.5-6.5)
=7.25*(-3)
=-21.75本回答被网友采纳
第2个回答 2020-06-02
7.25×3.5+7.25×6.5
=7.25×(3.5+6.5)
=7.25×10
=72.5
=7.25×(3.5+6.5)
=7.25×10
=72.5
第3个回答 2020-06-02