问题 解答题
计算题
(1)(-20)+(-18)-(-14)
(2)(+
3
2
)-
5
12
-
5
2
+(-
7
12
)

(3)-36÷(
1
2
+
5
6
-
7
12

(4)-14-
1
6
×[3-(-3)2]

(5)(-
2
3
-
5
6
+
11
12
1
24

(6)(-2)3÷16-(-0.125)×(-4)2
(7)-8-[-7+(1-
2
3
×0.6)÷(-3)]

(8)|-
7
9
|÷(
2
3
-
1
5
)-
1
3
×(-4)2
答案

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

=-38+14

=-24;

(2)(+

3
2
)-
5
12
-
5
2
+(-
7
12
)

=(

3
2
-
5
2
)-(
5
12
+
7
12

=-1-1

=-2;

(3)-36÷(

1
2
+
5
6
-
7
12

=-36÷

3
4

=-48;

(4)-14-

1
6
×[3-(-3)2]

=-1-

1
6
×[3-9]

=-1-

1
6
×[-6]

=-1+1

=0;

(5)(-

2
3
-
5
6
+
11
12
1
24

=(-

2
3
-
5
6
+
11
12
)×24

=-

2
3
×24-
5
6
×24+
11
12
×24

=-16-20+22

=-14;

(6)(-2)3÷16-(-0.125)×(-4)2

=-8÷16-(-0.125)×16

=-0.5+2

=1.5;

(7)-8-[-7+(1-

2
3
×0.6)÷(-3)]

=-8-[-7+(1-0.4)÷(-3)]

=-8-[-7+0.6÷(-3)]

=-8-[-7-0.2]

=-8+7.2

=-0.8;

(8)|-

7
9
|÷(
2
3
-
1
5
)-
1
3
×(-4)2

=

7
9
÷
7
15
-
1
3
×16

=

5
3
-
16
3

=-3

2
3

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