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3rd level

Column addition and subtractionColumn addition

In the column method of addition and subtraction, numbers are written so their place values line up vertically forming columns for ones, tens, hundreds, thousands etc.

Part of MathsNumber and number processes

Column addition

Numbers can be added together using the column method. This involves writing one number underneath the other.

Example

What is \(343 + 315\)?

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Start from the ones column: 3 + 5 = 8
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In the tens column: 40 + 10 = 50. 5 is written in the tens column as this is worth 50
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In the hundreds column: 300 + 300 = 600. 6 is written in the hundreds column as this is worth 600
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The finished sum

Example

What is \(343 + 329\)?

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Start from the ones column: 3 + 9 = 12, place a 2 in the ones column and carry 10 to the tens column by placing a 1
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In the tens column: 40 + 20 + 10 = 70
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In the hundreds column: 300 + 300 = 600
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The finished calculation

Question

Using column addition, work out the value of \(427 + 363\).

Column subtraction

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