问题 解答题
计算:(1)
1
30
-(-
2
3
+
3
5
)÷(-2);
(2)(
1
8
+1
1
3
-2.75)×(-24)+(-1)2008
答案

(1)原式=

1
30
-(-
10
15
+
9
15
)×(-
1
2

=

1
30
-(-
1
15
)×(-
1
2

=

1
30
-
1
30

=0;

(2)原式=(

1
8
+
4
3
-
11
4
)×(-24)+1

=-3-32+66+1

=32.

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