Question

1000-100-10-1

ai k mn mn k lai

Answer 1

1000-100-10-1

=900-10-1

=890-1

=889

tk nhe

Answer 2

1000-100-10-1

=900-10-1

=890-1

=889

Answer 3

1 000 - 100 - 10 - 1

= 900 -10 - 1

= 890 - 1

= 889

tk r đó tk nha 

Answer 4

    1000-100-10-1

= ( 1000 - 100 ) - ( 10 - 1 )

=  900 - 9 

=  891