Add 3-digit numbers using column addition
I can add 3-digit numbers using column addition.
Add 3-digit numbers using column addition
I can add 3-digit numbers using column addition.
Lesson details
Key learning points
- When using column addition, start by adding numbers with the smallest place value first.
- Use zero to show that there are no tens or ones in a 3-digit number.
- Partition each number carefully into hundreds, tens and ones.
Common misconception
Pupils may not use zero to show that there are no tens or ones number in a 3-digit number. They may also use a zero to show that there are no hundreds when adding a 2-digit to a 3-digit number.
Emphasise with pupils that they need to use a zero only when needed. The number 75 would not be written as 075, so should not be written like this in column addition.
Keywords
Addend - An addend is a number added to another.
Sum - The sum is the the total when numbers are added together.
Column addition - Column addition is a way of adding numbers by writing a number below another.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
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