题目内容

计算
(1)-12×4-(-6)×5;
(2)4-(-2)3-32÷(-1)3
(3)-24+3×(-1)4-(-2)3
(4)(-
1
2
+
2
3
-
1
4
)×(-24)

(5)(-4
7
8
)-(-5
1
2
)+(-4
1
4
)-(+3
1
8
);
(6)
3
2
×[3÷(-
2
3
)
2
-14]

(7)-14-
1
6
×[2-(-3)2]

(8)0.25×(-2)3-[4÷(-
2
3
)
2
+1]+(-1)2007
(1)原式=-48-(-30)
=-48+30
=-18;

(2)原式=4-(-8)-9÷(-1)
=4+8+9
=21;

(3)原式=-16+3×1-(-8)
=-16+3+8
=-5;

(4)原式=-
1
2
×(-24)+
2
3
×(-24)-
1
4
×(-24)
=12-16+6
=2;

(5)原式=-4
7
8
-3
1
8
+5
1
2
-4
1
4

=-8+1
1
4

=-6
3
4


(6)原式=
3
2
×[3×
9
4
-1]
=
3
2
×
23
4

=
69
8

(7)原式=-1-
1
6
×[2-9]
=-1-
1
6
×[-7]
=-1+
7
6

=
1
6


(8)原式=0.25×(-8)-[4×
9
4
+1]-1
=-2-[9+1]-1
=-2-10-1
=-13.
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