问题 解答题
计算题:
(1)-9+12-(-3)+8
(2)-5+6÷(-2)×
1
3

(3)(-1)2008-54×(
5
6
-
4
9
+
1
3
)

(4)-14-(1-0.5)×
1
3
×[2-(-3)2]
答案

(1)-9+12-(-3)+8

=-9+12+3+8

=14;

(2)-5+6÷(-2)×

1
3

=-5-3×

1
3

=-5-1

=-6;

(3)(-1)2008-54×(

5
6
-
4
9
+
1
3
)

=1-54×

5
6
+54×
4
9
-54×
1
3

=1-45+24-18

=-38;

(4)-14-(1-0.5)×

1
3
×[2-(-3)2]

=-1-

1
2
×
1
3
×[2-9]

=1-

1
6
×(-7)

=-1+

7
6

=

1
6

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