问题 解答题
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)]
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.

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