Use column addition to add numbers by regrouping ones
Lesson details
Learning outcome
I can use column addition to add numbers by regrouping ones.
Key learning points
- Start with the ones column so that regrouping can be represented
- If the sum of the ones digits is ten or greater, regrouping is needed
- Any complete tens are regrouped into the tens column
Keywords
Column addition - Column addition is a way of adding numbers by writing a number below another.
Regroup - Regroup means moving an amount to make a calculation easier.
Common misconception
Pupils may regroup incorrectly, forget to write the regrouped ten or forget to add any regrouped tens when calculating the total for the tens column.
Emphasise that the regrouped number is a ten and that it needs to be added to the tens total. If necessary, revisit the use of base ten blocks.
Teacher tip
Pupils may find base ten blocks helpful, particularly at the start of the session. Ensure that pupils understand regrouping before moving on to introduce the more abstract version of the column addition algorithm.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Calculate the missing sum.
Q2.Calculate the missing number in the column addition.
Q3.Calculate the missing sum.
Q4.Find the value of the missing digit in the column addition.
Q5.What is the missing addend in the column addition?
Q6.What is the missing addend in the column addition?
Assessment exit quiz
6 Questions
Q1.13 can be regrouped into…
Q2. Match each ones numbers to the correct regrouping.
1 ten and 1 one
1 ten and 4 ones
4 tens and 1 one
4 tens and 4 ones
Q3.Calculate the missing sum.
Q4.Calculate the missing number in the column addition.
Q5.What is the missing sum?
Q6.What is the missing number in the column addition?
To help you plan your 3 maths lesson on: Use column addition to add numbers by regrouping ones, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 3 maths lesson on: Use column addition to add numbers by regrouping ones, 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.