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Add 3-digit and 2-digit numbers

Part of MathsAdding and subtractingYear 4

Column addition

Column addition is a very useful way to add 2-digit to 3-digit numbers. Here are some examples taking you through the method.

In each example first look at the ones column, then the tens column, then the hundreds column.

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Example 1

What is 237 + 22?

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  1. Start with the ones column and add the numbers: 7 + 2 = 9

    Start with the ones column and add the numbers: 7 + 2 = 9

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Example 2

What is 319 + 47?

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  1. Start in the ones column. 9 + 7 = 16. Because the answer is more than 10 we need to carry the 1 over to the tens column. Mark it below the column.

    Start in the ones column. 9 + 7 = 16. We need to carry over ten to the tens column. Mark it below the column.

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Example 3

What is 531 + 93?

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  1. First, start in the ones column. 1 + 3 = 4

    First, start in the ones column. 1 + 3 = 4

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