Use knowledge of 10 and a bit to solve problems
Lesson details
Learning outcome
I can use my knowledge of 10 and a bit to solve problems.
Key learning points
- The teens numbers can be partitioned into ten and a bit.
- Problems can be represented using part-part-whole models, tens frames and sum equations.
- The 10 and a bit can be represented in the problem.
Keywords
Partition - The act of splitting an object or value down into smaller parts.
Part - A piece or section of the whole.
Sum - The total when numbers are added together.
Common misconception
Pupils continue to count all when finding the sum instead of counting on from 10 or using their developing fluency with partitioning teen numbers into 10 and a bit.
Provide concrete and pictorial examples where 10 is provided as a group that is hard to separate and count. Continue to emphasise one ten as a group of 10 that does not need to be counted in ones.
Teacher tip
Examples in this lesson make use of different types of addition and subtraction problem and include partitioning and reduction contexts. Ensure that any adaptation continues to use a range of structures.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.How many straws are shown here?
Q2.How many pencils are shown here?
Q3.Which place value chart represents the ten frames?
Q4.Look at the image. Which addition does it represent?
Q5.Match the word to the correct numeral.
Q6.Match the teen number to the number of tens and ones.
Assessment exit quiz
6 Questions
Q1.How many pencils are shown here?
Q2.What do we call the total when two parts are added to make the whole?
Q3.Which equation matches the part-part-whole model?
Q4.Which part part whole model matches this equation? 10 + 5 = 15
Q5.What is the missing whole in this image?
Q6.What is the missing part in this image?
To help you plan your 1 maths lesson on: Use knowledge of 10 and a bit to solve problems, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 1 maths lesson on: Use knowledge of 10 and a bit to solve problems, 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 1 maths lessons from the Composition of numbers 11 to 19 unit, dive into the full primary maths curriculum, or learn more about lesson planning.