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.