问题 解答题
计算
(1)22-(-4)+(-2)+4;
(2)-1-2×(-3);
(3)(-81)÷
9
4
×
4
9
÷(-
1
36
);
(4)(
7
9
-
5
6
+
3
4
)×(-36);
(5)0-32÷[(-2)3-(-4)];
(6)(-3)2-[(-
2
3
)+(-
1
4
)]÷
1
12

(7)-14÷(-5)2×(-
5
3
)+|0.8-1|;
(8)-3×(-
2
3
2-4×(1-
2
3
)-8÷(
2
3
2
答案

(1)22-(-4)+(-2)+4

=22+4-2+4

=30-2

=28;

(2)-1-2×(-3)

=-1+6

=5;

(3)(-81)÷

9
4
×
4
9
÷(-
1
36

=81×

4
9
×
4
9
×36

=576;

(4)(

7
9
-
5
6
+
3
4
)×(-36)

=-

7
9
×36+
5
6
×36-
3
4
×36

=-28+30-27

=-55+30

=-25;

(5)0-32÷[(-2)3-(-4)]

=0-9÷[(-8)-(-4)]

=0-9÷(-4)

=0+2.25

=2.25;

(6)(-3)2-[(-

2
3
)+(-
1
4
)]÷
1
12

=9-[(-

2
3
)+(-
1
4
)]×12

=9+8+3

=20;

(7)-14÷(-5)2×(-

5
3
)+|0.8-1|

=-1÷25×(-

5
3
)+
1
5

=

1
15
+
1
5

=

4
15

(8)-3×(-

2
3
2-4×(1-
2
3
)-8÷(
2
3
2

=-3×

4
9
-4×
1
3
-8÷
4
9

=-1

1
3
-1
1
3
-18

=-20

2
3

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