问题 解答题
脱式计算
306×3×4900-25×5(620+180)×872×5÷4.
答案

(1)306×3×4,

=918×4,

=3672;

(2)900-25×5,

=900-125,

=775;

(3)(620+180)×8,

=800×8,

=6400;

(4)72×5÷4,

=360÷4,

=90.

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