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计算:①-24+|5-8|+24÷(-3);②23÷[(-2)2-(-4)];③(-356)÷(-278)×(335-35×65)÷(-2×3)2;④(-5)×(-327)+(-7)×(−327)+(-12)×327.

题目详情
计算:
①-24+|5-8|+24÷(-3);
②23÷[(-2)2-(-4)];
③(-3
5
6
)÷(-2
7
8
)×(3
3
5
-
3
5
×
6
5
)÷(-2×3)2
④(-5)×(-3
2
7
)+(-7)×(−3
2
7
)+(-12)×3
2
7
▼优质解答
答案和解析
①-24+|5-8|+24÷(-3)
=-16+3-8
=-21;

②23÷[(-2)2-(-4)]
=23÷[4+4]
=23÷8
=
23
8


③(-3
5
6
)÷(-2
7
8
)×(3
3
5
-
3
5
×
6
5
)÷(-2×3)2
=-
23
6
÷(-
23
8
)×
72
25
÷36
=
23
6
×
8
23
×
72
25
×
1
36

=
8
75


④(-5)×(-3
2
7
)+(-7)×(−3
2
7
)+(-12)×3
2
7

=(-5)×(-3
2
7
)+(-7)×(−3
2
7
)+12×(-3
2
7

=(-3
2
7
)×(-5-7+12)
=(-3
2
7
)×0
=0.