Question

Tính nhanh. 2005.1789-2005-788.2005

Answer 1

2005 x 1789 - 2005 - 788 x 2005

= 2005 x 1789 - 2005 x 1 - 2005 x 788

= 2005 x ( 1789 - 1 - 788 )

= 2005 x 1000

= 2005000

Answer 2

2005.1789-2005-788.2005

=2005.1789-2005.1-788.2005

=2005.(1789-1-788)

=2005.1000

=2005000

Answer 3

= 2005. ( 1789-1-788)

= 2005. 1000

= 2005000

k nhe cỏ

Answer 4

2005.1789-2005-788.2005

=2005.1789-2005.1-788.2005

=2005.(1789-1-788)

=2005.1000

=2005000

Answer 5

2005.1789-2005-788.2005

=2005.1789-2005.1-788.2005

=2005.(1789-1-788)

=2005.1000

=2005000

Answer 6

thanks you có bn nào giải đc mấy bài khác k

Answer 7

  2005 . 1789 - 2005 - 788 . 2005 

= 2005 x 1789 - 2005 . 1 - 788 . 2005 

= 2005 . ( 1789 - 1 - 788 )

= 2005 . ( 1788 - 788 )

= 2005 .    1000

= 200 500 .

Answer 8

2005.1789-2005-788.2005

=2005.1789-2005.1-788.2005

=2005.(1789-1-788)

=2005.1000

=2005000