问题
解答题
|
答案
(1)1800÷[(15+10)×3],
=1800÷[25×3],
=1800÷75,
=24;
(2)[510-(150+120)]÷16,
=[510-270]÷16,
=240÷16,
=15;
(3)15×[107-(35-18)],
=15×[107-17],
=15×90,
=1350;
(4)[175-(29+26)]×23,
=[175-55]×23,
=120×23,
=2760;
(5)78+(64×8-320),
=78+(512-320),
=78+192,
=270;
(6)(272-186)×(345-245),
=86×100,
=8600;
(7)14×[(860-260)÷15〕],
=14×[600÷15],
=14×40,
=560;
(8)30÷[480÷(24-8)],
=30÷[480÷16],
=30÷30,
=1.