问题
解答题
(1)205×3-345
(2)54÷6+591
(3)670-45÷5
(4)264+6×6.
答案
(1)205×3-345,
=615-345,
=270,
(2)54÷6+591,
=9+591,
=600,
(3)670-45÷5,
=670-9,
=661,
(4)264+6×6,
=264+36,
=300.
(1)205×3-345
(2)54÷6+591
(3)670-45÷5
(4)264+6×6.
(1)205×3-345,
=615-345,
=270,
(2)54÷6+591,
=9+591,
=600,
(3)670-45÷5,
=670-9,
=661,
(4)264+6×6,
=264+36,
=300.