Add 3-digit numbers using column addition
Lesson details
Learning outcome
I can add 3-digit numbers using column addition.
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.
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.
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.
Teacher tip
Base ten blocks may be useful for some pupils in helping understand column addition with three digits. The number cards 0-5 will also be needed for task B.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which addition calculation is represented by the base ten blocks?
Q2.What is the missing sum in the column addition?
Q3.What is 340 + 100?
Q4.What is 410 + 70?
Q5.What is the missing number in the column addition?
Q6.What is the missing addend in this column addition?
Assessment exit quiz
6 Questions
Q1.Which addition calculation is represented by the base ten blocks?
Q2.What is the missing sum in the column addition?
Q3.What is the value of the missing digit in the column addition?
Q4.What is the missing digit in the column addition?
Q5.What are the missing digits in the addend in the column addition?
Q6.What is the missing addend?
To help you plan your 3 maths lesson on: Add 3-digit numbers using column addition, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 3 maths lesson on: Add 3-digit numbers using column addition, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Column addition unit, dive into the full primary maths curriculum, or learn more about lesson planning.