Add 2-digit numbers using column addition
Lesson details
Learning outcome
I can add 2-digit numbers using column addition.
Key learning points
- The addends are written in columns with the same value digits in the same column
- Start by adding numbers with the smallest place value first
- Record the sum below the addends
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 refer to adding numbers in the tens as 3 + 6 rather than 30 + 60
Encourage them to refer to the tens numbers as tens, and use the language appropriately. In 34 + 44, we add 4 and 4 together and then we add 30 and 40 together. This will support their reasoning as they progress in this unit.
Teacher tip
Base ten blocks may be useful to help children represent and understand column addition. Ensure that children understand that they start by adding the numbers on the right first - avoid saying 'start with the ones' as in upper key stage 2 they will be adding decimal numbers using column addition.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is represented by the digit 5 in 56?
Q2.What is represented by the digit 2 in 256?
Q3.Which calculation matches the base ten blocks representation?
Q4.Which calculation matches the base ten blocks representation?
Q5.Which calculation matches the column addition?
Q6.Which two numbers are being added in the column addition?
Assessment exit quiz
6 Questions
Q1.Which addition calculation is represented by the base ten blocks?
Q2.Which two addends are added in this column addition?
Q3.What is the missing sum in the column addition?
Q4.What is the missing sum in the column addition?
Q5.What ones digit is missing from this column addition?
Q6.What is the missing addend in this column addition?
To help you plan your 3 maths lesson on: Add 2-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 2-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.