Multiplication & Division
This video demonstrates the method for Long Multiplication. The secret is in setting up the calculation correctly at the beginning.
This next video looks at the written method (known as the bus stop method) for short division.
WARNING! This next video is LONG. However, it does explain the way to carry out the "chunking method" of long division. This is one of the newer calculation methods recognized as a formal written method, so parents and carers may wish to watch this video.