Question

9+9+9+6+3+2+57+78

Answer 1

9+9+9+6+3+2+57+78

=9+9+9+6+(2+78)+(57+3)

=9+9+9+6+80+60

=9+9+9+6+140

=27+6+140

=33+140

=173

Answer 2

9 + 9 + 9 + 6 + 3 + 2 + 57 + 78

= 9 + 9 + 9 +6 +(3 + 57) + (2 + 78)

=9 + 9 + 9 + 6 + 60 + 80

= 33 + 140

= 173

Answer 3

9+9+9+6+3+2+57+78

= 9 x 3 + 6 + 3 + 2 + 57 + 78

= 27 + 6 + 3 + 2 + 57 + 78

= ( 57 + 3 ) + ( 78 + 2)  +  ( 27 + 6 )

= 60 + 80 + 33

= 140 + 33

= 173