问题 解答题

计算题.

(1)5600÷[(76+24)×14]

(2)980÷[(4700-4280)÷30]

(3)2000-(35+71)×8

(4)30×(320-170)÷90.

答案

(1)5600÷[(76+24)×14],

=5600÷[100×14],

=5600÷1400,

=4;

(2)980÷[(4700-4280)÷30],

=980÷[420÷30],

=980÷14,

=70;

(3)2000-(35+71)×8,

=2000-106×8,

=2000-848,

=1152;

(4)30×(320-170)÷90,

=30×150÷90,

=4500÷90,

=50.

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