问题 解答题
计算:
(1)-
3
4
×(-8+
2
3
-
1
3
);
(2)
3-8
-
121

(3)-32+5×(-
8
5
)-(-4)2÷(-8);
(4)2×[9+2(
5
-2)+]+
38
(精确到0.01).
答案

(1)原式=-

3
4
×(-8+
1
3

=-

3
4
×(-
23
3

=5

3
4

(2)原式=-2-11

=-13;

(3)原式=-9-8-16÷(-8)

=-9-8+2

=-15;

(4)原式=2×[9+2

5
-4]+2

=2×(5+2

5
)+2

=10+4

5
+2

≈20.94.

解答题
单项选择题 A2型题