Use estimation to support accurate calculation
Lesson details
Learning outcome
I can use estimation to support accurate calculation
Key learning points
- Use times tables and place value to estimate the product of a 3-digit by a 1-digit multiplication.
- Use expanded short multiplication to multiply a 3-digit by a 1-digit number.
- Use short multiplication to multiply a 3-digit by a 1-digit number.
Keywords
Expanded multiplication - A way of recording the steps of a calculation focusing on partitioning one or more factors and showing partial products.
Short multiplication - A way of recording using columns to set out and calculate a multiplication.
Estimate - To find a value that is close enough to the right answer, usually with some thought or calculation involved.
Common misconception
Pupils attempt to estimate using approximations that do not allow for quick mental calculation.
Spend time estimating yourself and modelling the simplicity of it. Use estimations regularly to check the magnitude of an answer.
Teacher tip
Estimation is a valuable skill to support checking answers. Take time to model estimation and checking final calculations against these to support pupils in seeing the value of estimating.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the equation the product.
14
18
63
21
70
Q2.Which multiples of 10 is 47 between?
Q3.Which multiples of 100 is 256 between?
Q4.26 × 4 Use the expressions. The answer will be between 80 and .
Q5.True or false: 3 × 30 < 3 × 34
Q6.Estimate and record your calculation as an informal or formal strategy. Eric buys 4 football tickets at £32 each. He then sells 1 at a discounted price of £29. How much did he spend in total? £
Assessment exit quiz
6 Questions
Q1.Which multiples of 100 is 447 in between?
Q2.Match the sentence stems to the correct inequalities expression
300 < 345 < 400
400 < 443 < 500
600 < 697 < 700
800 < 801 < 900
Q3.Estimate the numbers that the answer will be between for the value of the expression 547 × 3
Q4.Choose an appropriate estimation for the value of the expression 471 × 4
Q5.Estimate the numbers that the answer will be between for the value of the expression: 647 × 7
Q6.Eric buys 6 football tickets at £304 each. He then sells 1 at a discounted price of £299. How much did he spend altogether? £
To help you plan your 5 maths lesson on: Use estimation to support accurate calculation, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 5 maths lesson on: Use estimation to support accurate calculation, 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 Multiplication by partitioning leading to short multiplication (3 by 1-digit) unit, dive into the full primary maths curriculum, or learn more about lesson planning.