Review adding 3-digit numbers using column addition without regrouping
Lesson details
Learning outcome
I can add 3-digit numbers using column addition.
Key learning points
- The addends are written in columns with the same value digits in the same column.
- The sum is recorded underneath the addends with the same value digits in the same column.
- Use zero to show that there are no tens or ones in a 3-digit number.
- When using column addition, always start by adding the numbers with the smallest place value first.
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
When finding missing numbers in column addition, pupils may find it difficult to identify whether they can add or subtract.
Remind pupils that addends are parts and the sum is the whole. To find a missing part, we subtract the known part from the whole. To find a missing whole, we add the known parts together. Bar models or part-part-whole models can model this.
Teacher tip
Ensure that pupils understand that digits have to be set out in the correct columns if they are to represent the value of a given number. Because regrouping has not yet been revisited, challenge thinking using missing digits and targeting a number using digit cards.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is the sum in this column addition?
Q2.What ones digit is missing from this column addition?
Q3.What tens digit is missing from this column addition?
Q4.Which two addends would make this column addition correct?
Q5.Which addend would make this column addition correct?
Q6.Use the digit cards. Set them out to make two 2-digit numbers. What is the largest sum you can make?
Assessment exit quiz
6 Questions
Q1.Which expression is represented by the Base 10 blocks?
Q2.What is the missing sum in the column addition?
Q3.What tens digit is missing from this column addition?
Q4.What hundreds digit is missing from this column addition?
Q5.What is the missing addend?
Q6.Use the digit cards. Set them out to make a 3-digit and a 2-digit number. What is the largest sum you can make?
To help you plan your 4 maths lesson on: Review adding 3-digit numbers using column addition without regrouping, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 4 maths lesson on: Review adding 3-digit numbers using column addition without regrouping, 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.