Question

tính nhanh

1268x99+1268

Answer 1

1268x99+1268

= 1268x99+1268x1

= 1268 x ( 99 + 1 )

= 1268 x 100

=126800

Answer 2

1268*99+1268

=1268*99+1268*1

=1268*(99+1)

=1268*100

=126800

Answer 3

1268x99+1268=1268x(99+1)

                     =1268x100

                     =126800

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