问题 解答题
计算:
(1)
5
×(
10
-
5
)

(2)(20
48
-8
27
+2
12
6

(3)(6
x
4
-2x
1
x
)÷3
x

(4)(8
2
-3
6
)÷2
2
-(
3
-1)2
答案

(1)原式=

5
×
10
-
5
×
5

=5

2
-5;

(2)原式=(80

3
-24
3
+4
3
)÷
6

=60

3
÷
6

=30

2

(3)原式=(3

x
-2
x
)÷3
x

=

x
÷3
x

=

1
3

(4)原式=8

2
÷2
2
-3
6
÷2
2
-(3-2
3
+1)

=4-

3
3
2
-4+2
3

=

3
2

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