To add two digit numbers, first you add the ones column and then you add the tens
column.
To find the sum.
Add the ones.
Add the tens.
Tens
Ones
2
4
3
1
Tens
Ones
2
4
3
1
5
Tens
Ones
2
4
3
1
5
5
Find the sum.
2
4
+2
3
3
4
+2
1
1
6
+3
3
3
6
+4
1
4
3
+2
6
5 2
+2
7
5
6
+3
2
7
1
+1
8
4
7
+2
1
8
0
+1
3
2
7
+3
1
4
4
+2
2
1
4
+3
3
6
0
+3
9
5
0
+2
7
3
6
+5
3
1
7
+6
1
2
9
+3
0
1
7
+3
0
2
8
+3
1
3
6
+4
2
1
6
+5
2
2
9
+7
0
1
3
+8
0
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