Answer
145
Work Step by Step
Step 1: Add the digits in one’s column
Sum of the ones column 7+8= 15. Write 5 ones in the ones column and write 1 tens in the tens column.
1
6 7
+7 8
____
5
Step 2: Add the digits in the tens column, including the regrouped 1.
Sum of the tens column 1+6+7=14. Write 4 tens in the tens column and 1 hundred in the hundred column.
1 1
6 7
+7 8
____
14 5
