Question

Tính nhanh phân số sau

2009+2009×99

Answer 1

\(2009+2009\times99\)

\(=2009\times\left(99+1\right)\)

\(=2009\times100\)

\(=200900\)

Answer 2

\(2009\left(99+1\right)=2009\left(100\right)=200900\)

Answer 3

2009+2009x99

= 2009x(1+99)

= 2009x100

= 200900

Answer 4

2009+2009x99

=2009x(99+1)

=2009x100

=200900

Answer 5

2009 + 2009 x 99

= 2009 x 1 + 2009 x 99

= 2009 x ( 1 + 99 )

= 2009 x 100

= 200 900

Answer 6

2009+2009x99= 2009x1+2009x99

                        = 2009x(1+99)

                        = 2009 x 100

                        = 200900