Question

9*9+25*9+31*18

Answer 1

9.9+25.9+31.18

=81+225+558

=864

Answer 2

       9 * 9 + 25 * 9 + 31 * 18

    = 9 * 9 + 25 * 9 + 31 * 2 *9

    = 9 * ( 9 + 25 + 62 )

    = 9 * 96

    =   864

Answer 3

\(=864\)

Answer 4

9*9+25*9+31*18=900 

Answer 5

9*9+25*9+31*18=900

Answer 6

9*9+25*9+31*18

=9*9+25*9+62*9

=9*(9+25+62)

=9*96

=864

k nha

Answer 7

9.9+25.9+31.18

=9.(9+25+63)

=864

Answer 8

9 x 9 + 25 x 9 + 31 x 18

= 9  x 9 + 25 x 9 + 31 x 2 x9

= 9 x 9 + 25 x 9 + 62 x 9

= ( 9 +25 + 62) x 9

= 96 x 9

= 864

 vậy 9x9 +25x9+31x18=864