Question

trình bày bài này bằng công thức gọn lại như thế nào:

185 x 99 + 15 x 49 + 185 x 1 + 15 x 51

Answer 1

185 x 99 + 15 x 49 + 185 x 1 + 15 x 51 =

185 x ( 99 + 1 ) + 15  x (51 + 49) =

185 x 100 + 15 x 100 = 

100 x  (185 + 15) = 

100 x 200 = 20 000

Answer 2

=185x(99+1)+15x(49+51)

=185x100+15x100

=(185+15)x100

=200x100

=20000

Answer 3

185 x 99 + 15 x 49 + 185 x 1 + 15 x 51 =

185 x ( 99 + 1 ) + 15  x (51 + 49) =

185 x 100 + 15 x 100 = 

100 x  (185 + 15) = 

100 x 200 = 20 000

Answer 4

185 x 99 + 15 x 49 + 185 x 1 + 15 x 51

= 185(99 + 1) + 15(49 + 51)

= 185 x 100 + 15 x 100

= 100( 185 + 15)

= 100 x 200

= 20000 

Answer 5

185 x 99 + 15 x 49 + 185 x 1 + 15 x 51

= 185 x ( 99 + 1 ) + 15 x ( 49 + 51 )

= 185 x 100 + 15 x 100

= 18500 + 1500

= 20000

Answer 6

185 x 99 + 15 x 49 + 185 x 1 + 15 x 51 =

185 x ( 99 + 1 ) + 15  x (51 + 49) =

185 x 100 + 15 x 100 = 

100 x  (185 + 15) = 

100 x 200 = 20 000

Answer 7

185x99+15x49+185x1+15x51

=185x(99+1)+15x(49+51)

=185x100+15x100

=(185+15)x100

=200x100

=20000