问题 解答题
计算:
(1)(-12)-5+(-14)-(-39)
(2)2-2÷
1
3
×3
(3)(
5
12
+
2
3
-
3
4
)×(-12)

(4)-14-(1-0.5)×
1
3
×[2-(-3)2]
答案

(1)(-12)-5+(-14)-(-39)

=-12-5-14+39

=8;

(2)2-2÷

1
3
×3

=2-6×3

=2-18

=-16;

(3)(

5
12
+
2
3
-
3
4
)×(-12)

=-5-8+9

=-4;

(4)-14-(1-0.5)×

1
3
×[2-(-3)2]

=-1-

1
2
×
1
3
×[2-9]

=-1-

1
2
×
1
3
×[-7]

=-1+

7
6

=

1
6

选择题
填空题