问题 解答题
计算 
(1)26-17+(-5)-33
(2)-23÷
4
9
×(-
3
2
)
2

(3)18-6÷(-2)×(-
1
3
)

(4)(-3)2×[
2
3
+(-
5
9
)]
答案

(1)26-17+(-5)-33

=26+(-17)+(-5)+(-33)

=26+[(-17)+(-5)+(-33)]

=26+(-55)

=-29;

(2)-23÷

4
9
×(-
3
2
)
2

=-8÷

4
9
×
9
4

=-8×

9
4
×
9
4

=-

81
2

(3)18-6÷(-2)×(-

1
3
)

=18-6×(-

1
2
)×(-
1
3

=18-6×

1
6

=18-1

=17;

(4)(-3)2×[

2
3
+(-
5
9
)]

=9×[

2
3
+(-
5
9
)]

=9×

2
3
+9×(-
5
9

=6+(-5)

=1.

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