问题 解答题
计算:
(1)3
1
2
+(-
1
2
)-(-
1
3
)+2
2
3

(2)(-5)×6+(-125)÷(-5)
(3)-82+3×(-2)2+(-6)÷(-
1
3
)2

(4)-2×(-
1
2
)2+|-(-2)|3-(-
1
2
)
答案

(1)3

1
2
+(-
1
2
)-(-
1
3
)+2
2
3

=3

1
2
-
1
2
+
1
3
+2
2
3

=3+3

=6;

(2)(-5)×6+(-125)÷(-5)

=-30+25

=-5;

(3)-82+3×(-2)2+(-6)÷(-

1
3
)2

=-64+3×4+(-6)×9

=-64+12-54

=-106;

(4)-2×(-

1
2
)2+|-(-2)|3-(-
1
2
).

=-2×

1
4
+8+
1
2

=-

1
2
+8+
1
2

=8.

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