问题 解答题
计算:
(1)4
1
2
-
50

(2)
3
3
-
1
3
+
2

(3)(5+
10
)(5
2
-2
5
)

(4)(
3
5
-
60
5
5
答案

(1)原式=2

2
-5
2

=-3

2

(2)原式=

3
-(
3
-
2

=

3
-
3
+
2
=
2

(3)原式=25

2
+10
5
-10
5
-10
2

=15

2

(4)原式=(

15
5
-2
15
)×
5

=

3
-10
3
=-9
3

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