问题 解答题
计算 
(1)(-3.6)+(+2.5)
(2)3-2×(-5)2
(3)-24×(-
5
6
+
3
8
-
1
12
)

(4)
1
2
+(-
2
3
)+
4
5
+(-
1
2
)+(-
1
3
)

(5)-14-(
13
14
-
11
12
)×[4-(-2)2]

(6)5×(-6)-(-4)2÷(-8)
(7)-7.2-0.9-5.6+1.7
(8)(-1
3
5
)+(-3.2)+|-1.8|
答案

(1)(-3.6)+(+2.5)=-1.1;

(2)3-2×(-5)2

=3-2×25

=3-50

=-47;

(3)-24×(-

5
6
+
3
8
-
1
12
)

=24×

5
6
-24×
3
8
+24×
1
12

=20-9+2

=13;

(4)

1
2
+(-
2
3
)+
4
5
+(-
1
2
)+(-
1
3
)

=(

1
2
-
1
2
)+(-
2
3
-
1
3
)+
4
5

=0-1+

4
5

=-

1
5

(5)-14-(

13
14
-
11
12
)×[4-(-2)2]

=-1-(

13
14
-
11
12
)×[4-4]

=-1-(

13
14
-
11
12
)×0

=-1-0

=-1;

(6)5×(-6)-(-4)2÷(-8)

=-30-16÷(-8)

=-30+2

=-28;

(7)-7.2-0.9-5.6+1.7

=-13.7+1.7

=-12;

(8)(-1

3
5
)+(-3.2)+|-1.8|

=-1.6-3.2+1.8

=-4.8+1.8

=-3.

解答题
填空题