Use column addition with regrouping to solve problems
Lesson details
Learning outcome
I can use column addition with regrouping to solve problems.
Key learning points
- Estimate the answer first to improve your accuracy.
- Start with the numbers with the smallest place value so that regrouping can be represented.
- Use strategies to check, recognising when the answer should be odd or even.
Keywords
Estimate - Estimation means to find a value that is close enough to the right answer, usually with some thought or calculation involved.
Regroup - The process of unitising and exchanging between place values is known as regrouping.
Common misconception
Pupils may spend too long trying to make a very accurate estimate for their calculations.
Pupils need to understand that an estimation should be quick and easy to calculate. Encourage them to think about the nearest hundreds numbers so that these can be added together very quickly to give a value close enough to the answer.
Teacher tip
Pupils will need to be familiar with regrouping ones and tens numbers when using column addition. For the second cycle in the lesson, the number cards 2-9 would be really useful as pupils can manipulate these to try and make the sums.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is the missing tens digit in the second addend in the column addition?
Q2.What is the missing ones digit in the second addend in the column addition?
Q3.What is the sum of the two numbers?
Q4.What would be a good estimate for the sum of 149 + 152?
Q5.Which of these calculations would it be more efficient to calculate mentally?
Q6.Which calculations will give a sum that is even?
Assessment exit quiz
6 Questions
Q1.Estimate the answer to 287 + 109 =
Which hundreds number is closest to the answer?
Q2.Estimate the answer to each calculation.
Which have answers close to 800?
Q3.Which calculations will give a sum that is odd?
Q4.Which two of these numbers have a sum of 633?
Q5.What is the missing tens digit?
Q6.What is the missing addend?
To help you plan your 3 maths lesson on: Use column addition with regrouping to solve problems, 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 with regrouping to solve problems, 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.