问题 解答题
(1)计算:9
45
÷3
15
×
4
3
2
2
3
-2
32

(2)计算:(
3
+
2
+
5
)(
3
-
2
-
5
)
答案

(1)原式=27

5
÷(3×
3
×
5
)×
8
2
9
-8
2

=3

3
×
2
9
-8
2
=
6
3
-8
2

(2)原式=(

3
2-(
2
+
5
2

=3-(2+2

10
+5)

=-4-2

10

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