问题 解答题
计算:
(1)-20+(-14)-(-18)-13       
(2)2
1
2
×
1
4
÷(-19+9)
(3)-5+6÷(-2)×
1
3
                  
(4)-32÷
4
9
×(-
2
3
)2+(-2)3
答案

(1)-20+(-14)-(-18)-13

=-20-14+18-13

=-47+18

=-29;

      

(2)2

1
2
x
1
4
÷(-19+9)

=

5
2
×
1
4
÷(-10)

=

5
8
÷(-10)

=-

1
16

(3)-5+6÷(-2)x

1
3

=-5-3×

1
3

=-5-1

=-6;

                  

(4)-32÷

4
9
×(-
2
3
)2+(-2)3

=-9÷

4
9
×
4
9
-8

=-9-8

=-17.

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