问题 解答题
(1)(-2)-(-5)+(-9)-(-7)
(2)18-6÷(-2)×(-
1
3
)

(3)(-
3
4
)×(-8+
2
3
-
1
3
)

(4)-11-2×(-33)+(-22)
答案

(1)原式=-2+5-9+7

=-11+12

=1;

(2)原式=18-6×(-

1
2
)×(-
1
3

=18-1

=17;

(3)原式=-

3
4
×(-8)-
3
4
×
2
3
-
3
4
×(-
1
3

=6-

1
2
+
1
4
=6-
1
4

=5

3
4

(4)原式=-11+66-22

=66-33

=33.

选择题
填空题