问题 解答题
计算:
(1)2
12
+3
48

(2)
1
7
+
28
-
700

(3)
32
-3
1
2
+
1
8

(4)(
6
-
5
)×(
6
+
5
)

(5)(2
3
-3
2
)2

(6)(
20
+
5
5
-2

(7)
2
3
27m3
-
m
2
108m
+6m
m
3
-m2
3
m

(8)
2
3
+1
+
3
2
+1.
答案

(1)原式=4

3
+12
3

=16

3

(2)原式=

7
7
+2
7
-10
7

=-

55
7
7

(3)原式=4

2
-
2
2
+
2
4

=

11
4
2

(4)原式=6-5=1;

(5)原式=12+18-12

6

=30-12

6

(6)原式=(2

5
+
5
)×
1
5
-2

=3-2=1;

(7)原式=

2
3
 ×3m 
3m
+
m
2
×6
3m
-m
3m

=2m

3m
+3m
3m
-m
3m

=0;

(8)原式=

2
3
+1
× 
3
-1 
3
-1
+
3
2
+1

=

3
-1+
3
2
+1

=

3
2
3

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