Explain the use of placeholders when multiplying whole numbers by 100
I can use place value to explain placing 2 0's after the final digit when we multiply whole numbers by 100
Explain the use of placeholders when multiplying whole numbers by 100
I can use place value to explain placing 2 0's after the final digit when we multiply whole numbers by 100
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Multiples of 100 have zero in the tens and ones column.
- When a number is multiplied by one hundred the product is a multiple of one hundred.
- Multiplying by one hundred moves all the digits two columns to the left making the digits one hundred times the size.
Keywords
Placeholder - A placeholder is where we use the digit 0 to hold a place in a number and maintain place value.
Magnitude - The magnitude of a number is its distance from 0
Common misconception
Many pupils believe that 'adding 2 zeros' is multiplying by 100 which can lead to difficulties later on when they are introduced to decimal numbers.
Don't dismiss it. It's a pattern that has been spotted and generalised. Do encourage the children to work with physical resources that don't involve the numbers themselves so they can understand that it isn't adding zero but changing place value.
To help you plan your year 4 maths lesson on: Explain the use of placeholders when multiplying whole numbers by 100, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 4 maths lesson on: Explain the use of placeholders when multiplying whole numbers by 100, 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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Explore more key stage 2 maths lessons from the Understand what happens when a number is multiplied or divided by 10 and 100 unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
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