问题 解答题
计算:
(1)1-
4
7
+
1
5
-
3
7
+
9
5

(2)-5
3
4
-[-1.5-(4.5-4
3
4
)]

(3)-24×(-
1
2
+
3
4
-
1
3
)

(4)18×(-
2
3
)+13×
2
3
-4×
2
3

(5)-1
1
2
×(
1
3
-1)÷|-
1
13
|

(6)-14÷(-52)×(-
5
3
)+|0.8-1|
答案

(1)1-

4
7
+
1
5
-
3
7
+
9
5

=1-

4
7
-
3
7
+
9
5
+
1
5

=1-1+2

=2;

(2)-5

3
4
-[-1.5-(4.5-4
3
4
)]

=-5

3
4
-(-1.5-4.5+4
3
4

=-5

3
4
+1.5+4.5-4
3
4

=-10.5+6

=-4.5;

(3)-24×(-

1
2
+
3
4
-
1
3

=-

1
2
×(-24)+
3
4
×(-24)-
1
3
×(-24)

=12-18+8

=20-18

=2;

(4)18×(-

2
3
)+13×
2
3
-4×
2
3

=

2
3
×(-18+13-4)

=

2
3
×(-9)

=-6;

(5)-1

1
2
×(
1
3
-1)÷|-
1
13
|

=-

3
2
×(-
2
3
)×13

=13;

(6)-14÷(-52)×(-

5
3
)+|0.8-1|

=-1×(-

1
25
)×(-
5
3
)+0.2

=-

1
15
+
1
5

=

2
15

选择题
单项选择题