Explain that different lengths can be composed additively and multiplicatively
I can explain that different lengths can be represented as addition and multiplication.
Explain that different lengths can be composed additively and multiplicatively
I can explain that different lengths can be represented as addition and multiplication.
Lesson details
Key learning points
- Partitioning 100 in different ways can be used to compose lengths.
- There are four 25s in 100 so there are four 25cm lengths in 1m.
- 1m divided into four equal parts is 25cm or 0.25m.
- 1m divided into five equal parts is 20cm or 0.2m.
Keywords
Common - Something is common when it is frequently used or it occurs regularly.
Compose - Larger numbers can be composed of smaller numbers.
Partition - The act of splitting an object or value down into smaller parts.
Common misconception
Pupils think that when a whole is divided into x parts, they need to have x interval markers.
Encourage pupils to make connections between the bar model and the number line, drawing attention to where each whole has been divided.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
each part has a value of 50
each part has a value of 25
each part has a value of 20.
Exit quiz
6 Questions
each part has a value of 0.5 m.
each part has a value of 0.25 m.
each part has a value of 0.2 m.
