This video for Year 6 teachers explains when decimal, whole number multiplications can be solved mentally and shows you how to use a written method for those that are more complex. 

How to Multiply a Decimal Number by a Whole Number

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It's essential that pupils understand how and why the digits move when they're multiplying by 10, 100 or 1000. In this video we just look at multiplying whole numbers but the principles apply in the same way to decimals.

How to Multiply a Whole Number by 10, 100, or 1000

This clip explains how pupils can apply their understanding of factors as an informal way of solving multiplication calculations and identifies the kinds of calculations where this approach should be encouraged.

How to Use Factors as an Informal Approach to Multiplication

This video explains the term lowest common multiple and demonstrates how pupils can use the lowest common multiple to compare fractions and solve problems.

How to Find the Lowest Common Multiple

This video explains the term highest common factor and demonstrates how to use the highest common factor to give fractions in their simplest form. 

How to Find the Highest Common Factor

Multiplying with decimals can be made much more straightforward if pupils are able to use compensation. Here we look at how you can teach pupils to multiply the decimal value by 10, 100 or 1000 and then adjust their answer. 

How to Teach Prime Numbers and Composite Numbers

This video provides some simple ideas for using concrete and pictorial representations to teach square and cube numbers.

How to Introduce Square Numbers and Cube Numbers

Watch this video to learn more about prime factors and how they can be identified using factor trees. 

How to Find the Prime Factors of a Number

How to Use Compensation to Multiply with Decimal Numbers

This video gives a quick summary of what it means to scale a shape up or down by a given scale factor and how to express a scale factor as a ratio.

Maths In Minutes

How to Multiply a Decimal Number by a Whole Number

More in this series: Multiplication Part 2: Upper KS2

Resources to raise maths attainment for all pupils

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