Myths about teaching can hold you back
- Year 10•
- Foundation
Checking and securing understanding of estimating through rounding
I can estimate the value of an expression through rounding.
- Year 10•
- Foundation
Checking and securing understanding of estimating through rounding
I can estimate the value of an expression through rounding.
Lesson details
Key learning points
- Rounding to 1 significant figure allows quick estimation with the magnitude of the estimation being close.
- The estimation will be closer to the true answer the less rounding you do.
- Estimating through rounding is meant to be quick and easy, taking too long defeats the purpose.
Keywords
Estimate - A quick estimate for a calculation is obtained from using approximate values, often rounded to 1 significant figure.
Significant figure - Significant figures are the digits in a number that contribute to the accuracy of the number. The first significant figure is the first non-zero digit.
Overestimate - An estimate for a calculation which is greater than the exact answer.
Underestimate - An estimate for a calculation which is less than the exact answer.
Common misconception
Assuming all zero digits are not significant.
Relate significance back to the communication of accuracy and that some digits are significant as they preserve the place value of other digits.
To help you plan your year 10 maths lesson on: Checking and securing understanding of estimating through rounding, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 maths lesson on: Checking and securing understanding of estimating through rounding, 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 4 maths lessons from the Rounding, estimation and bounds unit, dive into the full secondary maths curriculum, or learn more about lesson planning.