Combine tens and ones within equations
I can combine and partition tens and ones in the context of equations.
Combine tens and ones within equations
I can combine and partition tens and ones in the context of equations.
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Lesson details
Key learning points
- Known strategies can be used to help us prepare for the addition of two 2-digit numbers.
- It is important to be able to calculate mentally before adding two 2-digit numbers.
Keywords
Calculate - To work out an answer, often by adding or subtracting.
Efficiently - Not wasting time or effort. An efficient strategy is one we can carry out easily.
Common misconception
Children may rely on the order of the addends rather than their place value when calculating. They may also default to counting on rather than using known facts.
Refer back to known facts and efficient strategies and model their use throughout, discussing the best strategy to use at each point and why. Model errors that can be made when not adding ones then tens for example, or in counting on in ones.
To help you plan your year 2 maths lesson on: Combine tens and ones within equations, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 2 maths lesson on: Combine tens and ones within equations, 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.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 1 maths lessons from the Addition and subtraction of two 2-digit numbers 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
37 + 6 =
39 + 2 =
33 + 5 =
Exit quiz
6 Questions
1 + 40 + 3 + 20
4 + 1 + 30 + 20
2 + 10 + 30 + 4
40
20
3
