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Mr. Premus Math Refresher - How to do Long Multiplication with Decimals

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Topic 6.4: Multiplying a Decimal By A Whole Number

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Subtraction - Column Method (Using Partitioning)

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Subtraction - Column Method (Using Partitioning)

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Y4 - how to subtract using expanded column subtraction

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A video for Year 4 children and their parents showing how to subtract a 3-digit number from another 3-digit number using the expanded column subtraction method. Made by Mr Hyde using the 'Explain Everything' app on an iPad at St Helena's C of E Primary School, Willoughby, Lincolnshire, UK.

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This video shows how to use this method to solve simple calculations but you can use it to solve more challenging calculations too.

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Here we demonstrate how the use of the number line can be used with division

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Subtraction Using A Number Line (2-digit numbers)

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As taught by: Aldington Primary School, Challock Primary School, Chilham St. Mary's CE Primary School and St. Theresa's Catholic Primary School

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An explanation of the expanded method of division with examples, starting with the mental calculation strategy and working towards the compact algorithm.

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step by step description of how to perform column addition sums that involve carrying over.

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Addition - Expanded Column Method (Using Partitioning)

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Addition - Expanded Column Method (Using Partitioning)

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Y3 - how to add using expanded column addition

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A video for Year 3 children and their parents showing how to add two 3-digit numbers together using the expanded column addition method. Made by Mr Hyde using the 'Explain Everything' app on an iPad at St Helena's C of E Primary School, Willoughby, Lincolnshire, UK.

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Expanded column addition using 3 digit numbers

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Multiplication - Long Multiplication (expanded)

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Multiplication - Long Multiplication (expanded)

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Year 5 multiplication - Expanded column method

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This method can be used from Year 5 onwards.