Use column addition to add numbers by regrouping tens
Lesson details
Learning outcome
I can use column addition to add numbers by regrouping tens.
Key learning points
- When using column addition, start by adding the numbers with the smallest place value first.
- If the sum of the tens digits is ten or greater, regrouping is needed.
- Any complete hundreds are regrouped into the hundreds 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 forget to add the 'regrouped' hundred when calculating the total for the hundreds column.
Model regrouping and finding column totals clearly, reminding pupils to add together all of the numbers in the column to get the total.
Teacher tip
Pupils may find base ten blocks helpful at the start of the lesson, especially for understanding the concept of regrouping. Reinforce the idea of starting by adding from the smallest place value first. We do this because of regrouping.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.How many tens are equal to 130?
Q2.70 + 70 =
Q3.Calculate the missing sum using column addition.
Q4.Calculate the missing sum using column addition.
Q5.What is the value of the digit 7 in this column addition?
Q6.What number is missing from this column addition?
Assessment exit quiz
6 Questions
Q1.150 can be regrouped into…
Q2.Match each tens numbers to the correct regrouping.
Q3.Calculate the missing sum.
Q4.What tens digit is missing from this column addition?
Q5.What is the missing tens digit?
Q6.What is the missing tens digit?
To help you plan your 3 maths lesson on: Use column addition to add numbers by regrouping tens, 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 tens, 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.