Answer
78,446.
Work Step by Step
Step 1: Add ones column
12, 1 4 2
+ 43, 2 0 1
+ 23, 1 0 3
_______
6
Step 2: Add tens column
12, 1 4 2
+ 43, 2 0 1
+ 23, 1 0 3
_________
4 6
Step 3: Add hundreds column
12, 1 4 2
+ 43, 2 0 1
+ 23, 1 0 3
_________
4 4 6
Step 4: Add thousands Column
12, 1 4 2
+ 43, 2 0 1
+ 23, 1 0 3
_________
8, 4 4 6
Step 5: Add ten thousand column
12, 1 4 2
+ 43, 2 0 1
+ 23, 1 0 3
_________
78, 4 4 6
The sum of the three numbers is 78,446.