问题 解答题
(1)
4
×
9
-2

(2)
2
+
8
2

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

(4)(
5
-2)2
答案

(1)

4
×
9
-2

=6-2

=4;

(2)

2
+
8
2

=1+2

=3;

(3)(

3
-2)(2+
3
)

=3-4

=-1;

(4)(

5
-2)2

=5-4

5
+4

=9-4

5

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