题目内容

计算:
(1)(-2
1
2
)+(+
5
6
)+(-0.5)+(+1
1
6

(2)(-6)÷2×(-
1
3
);
(3)-62-(3-7)2-2×(-1)3-|-2|
(4)(
1
2
-
3
4
-
7
8
)×(-8)
(1)(-2
1
2
)+(+
5
6
)+(-0.5)+(+1
1
6

=(-2
1
2
-0.5)+(
5
6
+1
1
6

=-3+2
=-1;

(2)(-6)÷2×(-
1
3

=(-3)×(-
1
3

=1;

(3)-62-(3-7)2-2×(-1)3-|-2|
=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52;

(4)(
1
2
-
3
4
-
7
8
)×(-8)
=-
1
2
×8+
3
4
×8+
7
8
×8
=-4+6+7
=9.
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