问题 解答题
计算
(1)(-3)+(-4)-(+11)-(-9)
(2)(-81)÷2
1
4
×(-
4
9
)÷(-16)
(3)8-23÷(-4)3-
1
8

(4)-32×2-3×(-2)2
(5)(
1
2
-
5
9
+
5
6
-
7
12
)×(-36)
答案

(1)(-3)+(-4)-(+11)-(-9)

=-3-4-11+9

=-18+9

=-9;

(2)(-81)÷2

1
4
×(-
4
9
)÷(-16)

=-81×

4
9
×
4
9
×
1
16

=-1;

(3)8-23÷(-4)3-

1
8

=8+8÷64-

1
8

═8+

1
8
-
1
8

=8;

(4)-32×2-3×(-2)2

=-9×2-3×4

=-18-12

=-30;

(5)(

1
2
-
5
9
+
5
6
-
7
12
)×(-36)

=-18+20-30+21

=-48+41

=-7.

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