Understand what happens when a number is multiplied or divided by 10 and 100
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Why this why now
In this unit, pupils extend their knowledge of multiplication as scaling to understand that multiplying by 10 makes a number ten times the size and dividing by 10 makes it one-tenth times the size. They explain the role of zero as a placeholder when calculating with whole numbers and multiplying and dividing by 10 and 100. Pupils also explore what happens to the product and quotient when factors and dividends are made 10 or 100 times the size and apply this thinking to their multiplication facts.
Prior knowledge requirements
- Understand place value of digits in whole numbers
- Recognise patterns when multiplying by 10
- Identify how digit position changes with multiplication/division
Threads
Why this why now
In this unit, pupils extend their knowledge of multiplication as scaling to understand that multiplying by 10 makes a number ten times the size and dividing by 10 makes it one-tenth times the size. They explain the role of zero as a placeholder when calculating with whole numbers and multiplying and dividing by 10 and 100. Pupils also explore what happens to the product and quotient when factors and dividends are made 10 or 100 times the size and apply this thinking to their multiplication facts.
Prior knowledge requirements
- Understand place value of digits in whole numbers
- Recognise patterns when multiplying by 10
- Identify how digit position changes with multiplication/division
Understand what happens when a number is multiplied or divided by 10 and 100
In this unit pupils will explain the relationship between multiplying and dividing a number by 10 and multiples of 10.
15 lessons in unit
slide decks, worksheet PDFs, quizzes and lesson overviews. You can select individual lessons from the Understand what happens when a number is multiplied or divided by 10 and 100 unit and download the resources you need, or download the entire unit now. See every unit listed in our primary maths curriculum and discover more of our teaching resources for primary maths programmes.