Add and subtract one to or from a two-digit number within a decade
I can add and subtract 1 to and from a 2-digit number within a decade.
Add and subtract one to or from a two-digit number within a decade
I can add and subtract 1 to and from a 2-digit number within a decade.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Finding one more is the same as adding 1. Finding one less is the same as subtracting 1
- Numbers that are one more or one less than each other have a difference of one.
Keywords
One more - The number that is one more than another is the result of adding 1 to that number
One less - The number that is one less than another is the result of subtracting 1 from that number
Difference - The result of subtracting one number from another. How much one number differs from another.
Common misconception
The language of one more or one less than can confuse children, so 55 is one more than ? may be interpreted as 55 plus 1
Encourage children to articulate and explain in full sentences alongside number lines to support the understanding of the different ways to articulate the concept. Use stem sentences to support with this and display them around the classroom.
To help you plan your year 2 maths lesson on: Add and subtract one to or from a two-digit number within a decade, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 2 maths lesson on: Add and subtract one to or from a two-digit number within a decade, 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 1 maths lessons from the Adding and subtracting ones and tens to and from 2-digit numbers unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Starter quiz
6 Questions






Exit quiz
6 Questions





