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
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
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