问题 解答题
计算下列各题
(1)2x 
27x
+6x
4
3
x
        
(2)cos30°+sin45°-tan30°•tan60
(3)
27
-15
1
3
+
1
4
48
+
12

(4)
27
+2sin30°
+(x-2)0-2.
答案

(1)原式=6x

3x
+4x
3x

=10x

3x

(2)原式=

3
2
+
2
2
-
3
3
3

=

3
2
+
2
2
-1;

(3)原式=3

3
-5
3
+
3
+2
3

=

3

(4)原式=3

3
+2×
1
2
+1-2

=3

3
+1+1-2

=3

3

单项选择题 A1/A2型题
单项选择题