Solve problems involving multiples of ten
Lesson details
Learning outcome
I can solve problems involving multiples of ten.
Key learning points
- Unitising and known facts help you to add and subtract multiples of ten
- If 3 + 2 is equal to 5 then 3 tens + 2 tens is equal to 5 tens which is equal to 50
- If 5 - 2 is equal to 3 then 5 tens subtract 2 tens is equal to 3 tens which is equal to 30
Keywords
Add - To find the total, or sum, by combining two or more parts (addends), or to increase an amount by adding another.
Subtract - To partition one part from another (the subtrahend from the difference), or to decrease an amount by taking an amount away.
Multiple of ten - A multiple of 10 is a number which can be made of groups of ten.
Common misconception
Children may rely on counting in tens rather than using known facts to add and subtract multiples of ten.
Encourage children to look for patterns as they add and subtract multiples of ten. Compare to the single-digit facts they know. Ask 'Is there a known fact that can help you?'
Teacher tip
Cycle 2 contains some interesting puzzles which children may find challenging. Offer completed puzzles to investigate the rules of each to scaffold understanding. Allow lots of opportunity for pupil discussion and reasoning to explain their ideas.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Aisha shows an answer on a place value chart. Which equation could she have been answering?
Q2.Complete the equation. tens + 6 tens = 8 tens.
Q3.Complete the equation. tens − 5 tens = 2 tens.
Q4.What is the missing part in this part-part-whole model?
Q5.What equation is being represented by this bar model?
Q6.In this pyramid, two blocks add together to make the block above it.
What is the missing number at the top of the pyramid?
Assessment exit quiz
6 Questions
Q1.In this pyramid, two blocks add together to make the block above it.
What is the missing number at the top of the pyramid?
Q2.Tick the fact that can help solve this problem. Sam has 70 p in total. She has 20 p in her pocket and the rest in her purse. How much money does she have in her purse?
Q3.In this pyramid, two blocks add together to make the block above it.
What is the missing number in the pyramid shown with the question mark?
Q4.Sofia has 70 p but loses 30 p from a hole in her pocket. How much does she have left? pence.
Q5.Andeep buys a pencil for 30 p and a toy car for 70 p. How much has he spent? pence.
Q6.The arrows show the total for the row and column. What number is missing from the middle of this cross?
To help you plan your 2 maths lesson on: Solve problems involving multiples of ten, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 2 maths lesson on: Solve problems involving multiples of ten, 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 multiples of 10 unit, dive into the full primary maths curriculum, or learn more about lesson planning.