问题 解答题
计算:
(1)(-3)+(-4)-(+11)-(-9);
(2)-5
3
4
-[-1.5-(4.5-4
3
4
)]

(3)(
2
3
-
1
12
-
1
15
)×(-60)

(4)(-81)÷
9
4
×
4
9
÷(-16)

(5)-14÷(-52)×(-
5
3
)+|0.8-1|

(6)
1
4
×(-23
4
5
-(-8)÷[(-0.2)2-(-0.96) ] 
答案

(1)(-3)+(-4)-(+11)-(-9)=-3-4-11+9=-18+9=-9;

(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
=-
39
4
+6=-
15
4

(3)(

2
3
-
1
12
-
1
15
)×(-60)=
2
3
×(-60)-
1
12
×(-60)-
1
15
×(-60)
=-40+5+4=-31;

(4)(-81)÷

9
4
×
4
9
÷(-16)=81×
4
9
×
4
9
×
1
16
=1;

(5)-14÷(-52)×(-

5
3
)+|0.8-1|=-1×(-
1
25
)×(-
5
3
)
+0.2=-
1
15
+
1
5
=
2
15

(6)

1
4
×(-23
4
5
-(-8)÷[(-0.2)2-(-0.96) ] =
1
4
×(-8)×(
5
4
)
-(-8)÷(0.04+0.96)=-2.25-(-8)=5.75.

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