Use knowledge of positive and negative numbers to calculate intervals
Lesson details
Learning outcome
I can use knowledge of positive and negative numbers to calculate intervals.
Key learning points
- Differences between values are always positive
- Calculating differences across zero is the same as bridging through zero
Keywords
Bridging - A strategy which uses addition or subtraction to cross a number boundary.
Partitioning - Splitting a number or object into smaller parts.
Common misconception
Pupils sometimes answer a question like ‘What is the difference between −5℃ and 3℃?’ with ‘−8℃’.
Remind pupils that these differences are always positive by asking them to count forwards from the lower value to the higher value.
Teacher tip
Generalisations within this lesson about negative numbers should be regularly reinforced. Using choral repetition or fill in the gaps are great strategies for this.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Tick all of the options that show 17 partitioned into two parts.
Q2.Order these temperatures from warmest to coldest.
Q3.Tick all the statements that are true.
Q4.Put the following numbers into descending order.
Q5.38 + 49 =
Q6.Tick all the temperatures that would appear in between −30℃ and −20℃ on a number line.
Assessment exit quiz
6 Questions
Q1.The temperature was 5℃ in the day. Then it dropped to −4℃ at night. What was the change in temperature? ℃
Q2.Izzy was on the −3rd floor of a hotel. She took the lift to the 4th floor. How many floors did she go up?
Q3.A lift in a hotel goes up six floors from the floor marked −2. What floor is it now on?
Q4.The temperature is −7℃. Calculate the new temperature if it drops by 6℃. ℃
Q5.There is a temperature increase of 5℃ from −11℃. What is the new temperature? ℃
Q6.A submarine is below the surface of the water at −20 m. It goes up 5 m, then down 25 m. Where is it now?
To help you plan your 5 maths lesson on: Use knowledge of positive and negative numbers to calculate intervals, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 5 maths lesson on: Use knowledge of positive and negative numbers to calculate intervals, 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 Negative numbers unit, dive into the full primary maths curriculum, or learn more about lesson planning.