Use knowledge of addition to add commonly used prices efficiently
Lesson details
Learning outcome
I can use knowledge of addition to add commonly used prices efficiently
Key learning points
- Prices are often 1p or £1 lower than the next whole number of pounds so £2.99 not £3.00
- A number line supports rounding and adjusting strategies
- You might round one addend or all the addends
- Adjust the answer according to the rounding
Keywords
Addend - An addend is a number added to another number.
Round - When you round a number, you are making a number less accurate, but keeping it close to its original value.
Adjust - When you adjust a number you make a small change to it.
Redistribution - Redistribution is where part of one addend is moved to another addend.
Common misconception
Pupils use inefficient calculation strategies such as always using columnar methods.
Promote efficient mental strategies and model clear examples of the use of these.
Teacher tip
This is an excellent opportunity to promote and revisit mental and informal calculation strategies which are often more efficient than columnar methods. Take every opportunity to promote efficiency in this lesson.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is the closest multiple of 10 to 59?
Q2.What is the closest multiple of 100 to 299?
Q3.What is the closest multiple of 100 to 315?
Q4.What are the addend(s) in 3 + 4 = 7?
Q5.45 + 29 =
Q6.2.9 + 2.9 =
Assessment exit quiz
6 Questions
Q1.Use an adjusting strategy to solve this: 59 p + 37 p = p
Q2.Use the redistributing strategy to solve this: £0.26 + £0.59 = £
Q3.65 p + 99 p = £
Q4.£1.99 + £4.45 = £
Q5.35 p + 49 p = 34 p + 50 p is an example of which strategy?
Q6.£3.38 + £1.99 = £3.38 + £2 - 1 p is an example of which strategy?
To help you plan your 4 maths lesson on: Use knowledge of addition to add commonly used prices efficiently, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 4 maths lesson on: Use knowledge of addition to add commonly used prices efficiently, 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 Money: apply efficient strategies when calculating with money unit, dive into the full primary maths curriculum, or learn more about lesson planning.