Question

thuận tiện : 769 x 85 -  769 x 74 - 769

Answer 1

\(769\times85-769\times74-769=769\times\left(85-74-1\right)=769\times10=7690\)

Answer 2

\(769 . 85-769 . 74-769=769 . \left(85-74-1\right)=769 . 10=7690\)

Answer 3

\(769\times85-769\times74-769\)
\(=769\times\left(85-74-1\right)\)
\(=769\times10\)
\(=7690\)

Answer 4

769 x 85 -  769 x 74 - 769

= 769 x (85-74-1)

= 769 x 10

= 7690

Answer 5

`=769xx85-769xx74-769xx1`

`=769xx(85-74-1)`

`=769xx10`

`=7690`

Answer 6

   769 x 85 - 769 x 74 - 769

= 769 x 85 - 769 x 74 - 769 x 1

= 769 x ( 85 - 74 - 1 )

= 769 x          10

=            7690