97
3+6+7+89+4+5+7+9+90+67 = 287
the sum of 80 + 20 + 90 + 10 = 200
The sum of 7 plus 71 is 77.
SUM means plus 4+7=11
-73
The sum of 3 plus 4 is 7.
The sum is: 8
3 + 7 is an ADDITION sum
The answer = 3490
The answer = 3450
The answer = 3460
The answer = 3520