Maths Video Help Files created by John Bessant Maths Consultant at Abbotswood Junior School and Phil Bagge @baggiepr ICT AST. 

Subtraction with exchange 2 columns Embedding Code 
Subtraction with exchange crossing the zero three columns Embedding Code 

If you can't find what you are looking for here then Primary Pete has some more tutorials. He has tutorials for F & KS1


Column addition without carrying Embedding Code 
Addition using a number line Embedding Code 
Addition adding most significant digits (partitioning) Embedding Code  
Addition adding least significant digit (partitioning) Embedding Code  Subtraction Counting back on an empty number line Embedding Code  Subtraction Counting back when numbers have a large difference Embedding Code  Subtraction Counting on when numbers have a small difference Embedding Code  
Subtraction without exchange Embedding Code 
Subtraction with exchange Embedding Code 
Multiplication with arrays Embedding Code 

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Division using repeated subtraction with remainders Embedding Code 
Division using bus stop method without remainders Embedding Code 
Division using bus stop method with remainders Embedding Code 

Division using the chunking method Embedding Code 