题目内容

计算下列各题:
(1)(+10
1
3
)+(-11.5)+(-10
1
3
)-(+4.5);
(2)(-81)÷
9
4
×
4
9
÷(-16);
(3)-32-[-5-0.2÷
4
5
×(-2)2];
(4)24×(
1
6
-
3
4
-
5
8
)+(-
1
3
2÷(-
1
72
).
(1)(+10
1
3
)+(-11.5)+(-10
1
3
)-(+4.5)
=10
1
3
-11.5-10
1
3
-4.5
=10
1
3
-10
1
3
-11.5-4.5
=-16;
(2)(-81)÷
9
4
×
4
9
÷(-16)
=(-81)×
4
9
×
4
9
÷(-16)
=-16÷(-16)
=1;
(3)-32-[-5-0.2÷
4
5
×(-2)2]
=-9-[-5-
1
5
×
5
4
×4]
=-9-[-5-1]
=-9+6
=-3;
(4)24×(
1
6
-
3
4
-
5
8
)+(-
1
3
2÷(-
1
72

=24×
1
6
-24×
3
4
-24×
5
8
+
1
9
×(-72)
=4-18-15-8
=4-41
=-37.
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