题目内容

1800÷[(15+10)×3][510-(150+120)]÷16
15×[107-(35-18)][175-(29+26)]×23
78+(64×8-320)(272-186)×(345-245)
14×[(860-260)÷15]30÷[480÷(24-8)]
(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.
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