Review using column addition to add 2- and 3-digit numbers by regrouping ones
Lesson details
Learning outcome
I can use column addition including regrouping ones.
Key learning points
- When using column addition, start by adding the numbers with the smallest place value first.
- 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 - The process of unitising and exchanging between place values is known as regrouping.
Common misconception
Pupils may not regroup ones into the tens column.
Model regrouping from the ones to the tens. Encourage pupils to consider the size of the numbers, thinking about an approximate sum of the two addends. Is their answer reasonable?
Teacher tip
In this lesson, pupils review their understanding of regrouping in the ones when using column addition. Encourage them to approximate the sum of the two addends and use the digits to work out possible addends when given a sum (e.g. if the sum has a ones digit of 7, what could the addends be?)
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.1. What is the sum in this column addition?
Q2.What is the sum in this column addition?
Q3.What tens digit is missing from this column addition?
Q4.What hundreds digit is missing from this column addition?
Q5.Match the pairs of addends with the correct sum.
Q6.Which two addends complete the column addition?
Assessment exit quiz
6 Questions
Q1.In which column addition calculations do you need to regroup in the ones?
Q2.What is the sum in the column addition?
Q3.What is the sum in the column addition?
Q4.Which ones digit is missing from this column addition?
Q5.Which ones digit is missing from this column addition?
Q6.Match up the 2-digit numbers so that each pair has a sum of 83
To help you plan your 4 maths lesson on: Review using column addition to add 2- and 3-digit numbers by regrouping ones, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 4 maths lesson on: Review using column addition to add 2- and 3-digit 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 Review of column addition and subtraction unit, dive into the full primary maths curriculum, or learn more about lesson planning.