Question

A= 2002 x 20022001 - 2001 x 20022002 = ?

Answer 1

2002 x 20022001 - 2001 x 20022002=

2002 x 20022001 - 2001 x 10001 x 2002=

20020000

 

Answer 2

A = 2002 x 20022001 - 2001 x 20022002

= (2001+1) x 20022001 - 2001 x (20022001+1)

= 2001 x 20022001 + 1 x 20022001 - 2001 x 20022001 - 2001 x 1

= 2001 x 20022001 + 20022001 - 2001 x 20022001 - 2001 

= 2001 x 20022002 - 2001 x 20022001 + 20022001 - 2001

= 2001 x (20022002 - 20022001) + 20022002 - 2001

= 2001 x 1 + 20022002 - 2001

= 2001 + 20022002 - 2001

= 2001-2001+20022002

= 0+20022002

= 20022002

như này mới đúng!

Answer 3

A=20022002