Rounding to any number of decimal places
Lesson details
Learning outcome
I can round numbers to any number of decimal places.
Key learning points
- Numbers with any number of decimal places can be represented on a number line.
- Any number can be rounded to a given number of decimal places.
- It is possible to identify the most suitable number of decimal places from the context.
- It can be useful to think about what the biggest and smallest values of a number rounded in context were.
Keywords
Round - To change a number into another number that is approximately the same value but is easier to work with. E.g. round 561 to the nearest 10 is 560.
Common misconception
Pupils think that repeated rounding gives the correct answer.
Use a number line to support pupils’ understanding. Locate the number to be rounded on the line and identify the critical values.
Teacher tip
Pupils could measure the classroom and other areas and work out the cost of carpeting them. They could research the cost of different floor coverings and look that how much the price per metre affects the overall cost.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.1.643 is 1.6 to one decimal .
Q2.The midpoint of 6.1 and 6.2 is .
Q3.The midpoint of 6.104 and 6.105 is .
Q4.Round 104.5684 to 3 decimal places.
Q5.Round 0.0569 to three decimal places.
Q6.Round 203.0995 to three decimal places.
Assessment exit quiz
6 Questions
Q1.If a degree of accuracy is not stated in a question that you are answering, you should use the degree of accuracy as the values in the question.
Q2.Round 5.072 to two decimal places.
Q3.Round 34.072 to one decimal place.
Q4.Round 135.98 to one decimal place.
Q5.Calculate the cost of carpeting this area.
Q6.3 friends go out for lunch and spend £28. They pay the same amount each. What is the smallest amount they each pay to cover the cost of the bill?
To help you plan your 8 maths lesson on: Rounding to any number of decimal places, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 8 maths lesson on: Rounding to any number of decimal places, 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 3 maths lessons from the Estimation and rounding unit, dive into the full secondary maths curriculum, or learn more about lesson planning.