问题 解答题
脱式计算.
500-125×3(300+125)×4(2500-400)÷3
800-300÷5  25×8×6207×3-521.
答案

(1)500-125×3,

=500-375,

=125;

(2)(300+125)×4,

=300×4+125×4,

=1200+500,

=1700;

(3)(2500-400)÷3,

=2100÷3,

=700;

(4)800-300÷5,

=800-60,

=720;

(5)25×8×6,

=200×6,

=1200;

(6)207×3-521,

=621-521,

=100.

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