Question

Tính nhanh: 

2012 x 1001 - 2012 + 2013 x 999 + 2013

Answer 1

 = 2012 x (1001-1) + 2013 x (999+1)

 = 2012 x 1000 + 2013 x 1000

 = 1000 x (2012+2013)

 = 1000 x 4025 = 4025000

k mk nha

Answer 2

 

 = 2012 x (1001-1) + 2013 x (999+1)

 = 2012 x 1000 + 2013 x 1000

 = 1000 x (2012+2013)

 = 1000 x 4025 = 4025000

 

Answer 3

2012 x (1001-1)+2013 x (999+1)

=2012 x 1000 + 2013 x 1000

=1000 x (2012 + 2013)

=1000 x 4025=4025000

k cho chị nha cưng!

Answer 4

2012 x 1001 - 2012 + 2013 x 999 + 2013

= 2012 x (1001+999) x (2013 - 2013)

= 2012 x 2000 x 0

=2012000 x 0

= 0

Chắc là đúng.