Estimate the position of 3-digit numbers on unmarked number lines
Lesson details
Learning outcome
I can estimate the position of 3-digit numbers on an unmarked number line.
Key learning points
- Knowing where multiples of 100 are placed on an unmarked number line supports in positioning 3-digit numbers accurately.
- Marking halfway steps helps to estimate the positions of numbers.
- Counting in steps of 1, 10 and 100 helps us to position a number on a number line.
Keywords
Estimate - Estimate means finding a value that is close to the answer.
Position - Position means where something is located.
Unmarked - Unmarked means that many of the steps on a number line are not given.
Common misconception
Pupils may struggle with positioning numbers on 0-1,000 lines.
Relate the positioning of numbers on 0-100 number lines with 0-1,000 number lines (e.g. 19 and 190, 37 and 370).
Teacher tip
Encourage pupils to find the halfway points on unmarked number lines, using the start and end numbers. For example, on a 200-400 number line, mark the steps that show 300, then find 250 and 350.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What number is halfway between 0 and 100?
Q2.What number is halfway between 100 and 200?
Q3.What number is represented by the arrow?
Q4.What number is represented by the arrow?
Q5.Sofia is thinking of a 10s number that could be represented on the number line. The digits of the number add up to 6. What is the number?
Q6.What number is represented by the arrow?
Assessment exit quiz
6 Questions
Q1.The arrow shows the position of a number. Which number?
Q2.The arrow shows the position of a number. Which number?
Q3.Which of these is the best estimate for the number shown by the arrow on this number line?
Q4.Which of these is the best estimate for the number shown by the arrow on this number line?
Q5.Which of these is the best estimate for the number shown by the arrow on this number line?
Q6.Which arrow represents the position of 125?
To help you plan your 3 maths lesson on: Estimate the position of 3-digit numbers on unmarked number lines, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 3 maths lesson on: Estimate the position of 3-digit numbers on unmarked number lines, 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 Representing 3-digit numbers, comparing and positioning on number lines unit, dive into the full primary maths curriculum, or learn more about lesson planning.