问题 解答题
(1)8+(-10)+(-2)-(-5);
(2)(-2)÷
1
3
×(-3);
(3)-24×(-
1
2
+
3
4
-
1
3
);
(4)(-3)2+[20-(-2)3]÷(-3).
答案

(1)原式=8-10-2+5

=1;

(2)原式=-2×3×(-3)

=18;

(3)原式=-24×(-

1
2
)-24×
3
4
-24×(-
1
3

=12-18+8

=2;

(4)原式=9+(20+8)÷(-3)

=9-

28
3

=-

1
3

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