(3a2•1b)-12•a•3b6ab5=______．

题型：填空题难度：一般来源：不详

( 3 a2 • 1 b )- 1 2 • a • 3 b

6 ab5

=______．

答案

( 3 a2 • 1 b )- 1 2 • a • 3 b

6 ab5

=

(a 2 3 •b-1)- 1 2 •a 1 2 •b 1 3

a 1 6 •b 5 6

=a-

1

3

+

1

2

-

1

6

•b

1

2

+

1

3

-

5

6

=1．
故答案为：1．