问题 解答题
计算:
(1)[1
2
13
-(
5
8
-
1
6
+
7
12
]×24]÷(-5);
(2)(-10)+8×(-2)2-(-4)×(-3);
(3)-0.252÷(-0.5)3+(
1
8
-
1
2
)×(-1)10
(4)-3×(-
2
3
2-4×(1-
2
3
)-8÷(
2
3
2
(5)(-2)3-1
3
4
×(-
8
21
)-(-2)×(-1)×(-4).
答案

(1)原式=(

5
13
-15+4-14)×(-
1
5

=(

5
13
-25)×(-
1
5

=4

12
13

(2)原式=-10+32-12=10;

(3)原式=-

1
16
÷(-
1
8
)+(-
3
8

=

1
2
-
3
8

=

1
8

(4)原式=-3×

4
9
-4×
1
3
-8×
9
4

=-

8
3
-18

=-20

2
3

(5)原式=-8+

7
4
×
8
21
+8

=-8+

2
3
+8

=

2
3

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