问题 解答题
计算:
(1)(
27
+
18
3

(2)(2
2
-3
3
)(3
3
+2
2
)
答案

(1)(

27
+
18
)÷
3

=(3

3
+3
2
)÷
3

=3+

3
2
3

=3+

6

(2)(2

2
-3
3
)(3
3
+2
2
),

=(2

2
2-(3
3
2

=8-27,

=-19.

选择题
单项选择题 A1/A2型题