问题 解答题
计算:(1)
2
2
-1
+
18
-4
1
2

(2)(5
48
-6
27
+4
15
3

(3)(6
x
4
-2x
1
x
)÷3
x

(4)
18
+(
2
+1)-1+(-2)-2
答案

(1)原式=2(

2
+1)+3
2
-2
2
=3
2
+2;

(2)原式=(20

3
-18
3
+4
15
)÷
3

=20-18+4

5

=2+4

5

(3)原式=(3

x
-2
x
)÷3
x

=

x
÷3
x

=

1
3

(4)原式=3

2
+
2
-1+
1
4
=4
2
-
3
4

解答题
多项选择题