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# Multiplicative Reasoning

Created on 10 January 2014 by ncetm_administrator
Updated on 12 August 2014 by ncetm_administrator

# Multiplicative Reasoning

Multiplicative reasoning is central to the KS3 curriculum, but needs to begin at Primary. Representations in terms of the bar model and double number line are used to support reasoning and problem solving, which will in turn support problem solving.

## Introducing the bar model for multiplication

This video can also be watched on Vimeo, the video hosting site, where it is also possible to download a copy for your own use.

## Pupils first attempt at using bar model for multiplication problems

This video can also be watched on Vimeo, the video hosting site, where it is also possible to download a copy for your own use.

## Pupils continue using bar model for multiplication problems

This video can also be watched on Vimeo, the video hosting site, where it is also possible to download a copy for your own use.

## Extending the use of the bar model

This video can also be watched on Vimeo, the video hosting site, where it is also possible to download a copy for your own use.

## Estimating related lengths

This video can also be watched on Vimeo, the video hosting site, where it is also possible to download a copy for your own use.

## Calculating related quantities

This video can also be watched on Vimeo, the video hosting site, where it is also possible to download a copy for your own use.

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19 May 2016 15:28
When first using the bar model, I feel as a teacher we must be extremely careful with the children's understanding and therefore cautious around the children's learning, but with the correct explanation and teaching strategies then there would be minimal cautions relating to the topic.
21 January 2016 10:22
Its wonderful video. Only thing I want to tell you is that it is 4 times 5 and not 5 times 4. 5+5+5+5=20. Multiplication is repeated form of addition
12 August 2014 14:10
Brilliant - thanks for the quick response :-)
12 August 2014 13:36
Hi Roger, thank you for letting us know. That has now been fixed.
12 August 2014 13:28
Hi,

Vimeo video link for "Pupils continue using bar model for multiplication problems" seems to have the wrong video attached.