问题 解答题
计算
(1)(-3)+(-4)-(+11)-(-9)
(2)-0.5-(-3
1
4
)+2.75-7
1
2

(3)(
1
2
+
5
6
-
7
12
)×(-36)

(4)-14-(-5
1
2
4
11
+(-2)3÷|-32+1|
答案

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

=-3-4-11+9

=-18+9

=-9;

(2)-0.5-(-3

1
4
)+2.75-7
1
2

=(-0.5-7

1
2
)+(3.25+2.75)

=-8+6

=-2;

(3)(

1
2
+
5
6
-
7
12
)×(-36)

=-

1
2
×36-
5
6
×36+
7
12
×36

=-18-30+21

=-27;

(4)-14-(-5

1
2
4
11
+(-2)3÷|-32+1|

=-1+2-8÷|-9+1|

=-1+2-8÷8

=-1+2-1

=0.

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