题目内容

计算下列各题
(1)-13-(1+0.5)×(-
1
3
);              
(2)(+
1
2
)-(+5)+(-
1
3
)-(+
1
4
)+(+5
2
3
)

(3)(
7
4
-
7
8
-
7
12
)÷(-
7
8
)+(-
8
3
);      
(4)(-3)2÷
9
4
×(-
2
3
2÷4-22×(-
1
3
2
(1)-13-(1+0.5)×(-
1
3

=-1-(1.5)×(-
1
3

=-1+1.5×
1
3

=-1+0.5
=-0.5;
(2)(+
1
2
)-(+5)+(-
1
3
)-(+
1
4
)+(+5
2
3

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

=6
1
6
+(-5
7
12

=
7
12

(3)(
7
4
-
7
8
-
7
12
)÷(-
7
8
)+(-
8
3

=(
7
4
-
7
8
-
7
12
)×(-
8
7
)+(-
8
3

=-2+1+
2
3
+(-
8
3

=-2+1-2
=-3;
(4)(-3)2÷
9
4
×(-
2
3
2÷4-22×(-
1
3
2
=9×
4
9
×
4
9
×
1
4
-4×
1
9

=
4
9
-
4
9

=0.
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