Checking by estimating
I can estimate and check if solutions to problems are of the correct magnitude.
Checking by estimating
I can estimate and check if solutions to problems are of the correct magnitude.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Estimation should give you an idea of the size of an answer.
- It is useful to estimate the answer to calculations so you can check your answers make sense.
- Errors in calculations can be found by using estimates.
Keywords
Significant figures - Significant figures are the digits in a number that contribute to the accuracy of the number.
Estimate - A quick estimate for a calculation is obtained from using approximate values, often rounded to 1 significant figure.
Common misconception
When rounding a number, pupils write the first significant digit(s). e.g 36 789 is 4.
The use of the place value table shows the magnitude of the number, thus preserving their place value.
To help you plan your year 8 maths lesson on: Checking by estimating, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 8 maths lesson on: Checking by estimating, 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.
Licence
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
9212 -
9000 (1 s.f.)
8934.89 -
8934.9 (1 d.p.)
8910 -
8900 (2 s.f.)
8934.894 -
8934.89 (2 d.p.)
