How to add up numbers using the expanded column method.

1. Addition Using The Expanded
Column Method
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2. First, write the numbers in columns. For example;
426 + 138
+
H
4
1
T
2
3
U
6
8

3. First, write the numbers in columns. For example;
426 + 138
+
Now add up the
hundreds:
400 + 100 = 500
H
4
1
T
2
3
U
6
8
5
0
0

4. First, write the numbers in columns. For example;
426 + 138
+
H
4
1
T
2
3
U
6
8
5
0
0
5
0
Next add up the tens:
20 + 30 = 50

5. First, write the numbers in columns. For example;
426 + 138
U
6
8
0
0
5
Then add up the units:
6 + 8 = 14
T
2
3
5
+
H
4
1
0
1
4

6. First, write the numbers in columns. For example;
426 + 138
+
H
4
1
T
2
3
U
6
8
5
0
0
5
0
1
4
5
6
4
Finally add the 3
partial sums:
500 + 50 + 14 = 564

7. The sum can also be done by adding the units first, then the tens
and finally the hundreds. For example;
+
H
4
1
T
2
3
U
6
8
1
4

8. The sum can also be done by adding the units first, then the tens
and finally the hundreds. For example;
+
H
4
1
T
2
3
U
6
8
1
4
5
0

9. The sum can also be done by adding the units first, then the tens
and finally the hundreds. For example;
+
H
4
1
U
6
8
1
4
5
5
T
2
3
0
0
0

10. The sum can also be done by adding the units first, then the tens
and finally the hundreds. For example;
+
H
4
1
T
2
3
U
6
8
1
4
5
0
5
0
0
5
6
4

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