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.

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