Question

tính bằng cách thuận tiện nhất 1002 × 2015 -2015 -2015

Answer 1

  1002 × 2015 -2015 - 2015

 =1002 x 2015 - 2015 x1 - 2015 x 1

 =2015 x (1002 - 1 -1 )

 =2015 x 1000

 =2015000

kb k ^ - ^

Answer 2

1002 x 2015 - 2015 - 2015

= ( 1002 - 1 - 1 ) x 2015

= 1000 x 2015

= 2015000

Tk mk nhé ~~!!^_^

Answer 3

1002 x 2015 - 2015 - 2015 = 1002 x 2015 - 2015 x 1 - 2015 x 1 = 2015 x ( 1002 - 1 - 1 ) = 2015 x 1000 = 2015000