问题 解答题
计算:
(1)-20+(-14)-(-18)-13;
(2)(-
3
4
-
5
9
+
7
12
1
36

(3)-1-(-5
1
2
4
11
-(-8)÷|-3+1|

(4)-14+[1
1
24
-(
3
8
+
1
6
-
3
4
)×24]÷5
答案

(1)-20+(-14)-(-18)-13

=-20-14+18-13

=-47+18

=-29;

(2)(-

3
4
-
5
9
+
7
12
1
36

=(-

3
4
-
5
9
+
7
12
)×36

=-

3
4
×36-
5
9
×36+
7
12
×36

=-27-20+21

=-26;

(3)-1-(-5

1
2
4
11
-(-8)÷|-3+1|

=-1+2+8÷2

=-1+2+4

=5;

(4)-14+[1

1
24
-(
3
8
+
1
6
-
3
4
)×24]÷5

=-1+[1

1
24
-9-4+18]÷5

=-1+6

1
24
÷5

=-1+1

5
24

=

5
24

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