Answer
8,928
Work Step by Step
Step 1: Add ones column
3, 2 1 3
+ 5, 7 1 5
_________
8
Step 2: Add tens column
3, 2 1 3
+ 5, 7 1 5
_________
2 8
Step 3: Add hundreds column
3, 2 1 3
+ 5, 7 1 5
_________
9 2 8
Step 4: Add thousands Column
3, 2 1 3
+ 5, 7 1 5
_________
8, 9 2 8
The sum of the three numbers is 8,928.