Calculation-Multiplication and Division
The idea of Multiplication and Division is in the top 2 Videos. We can not understate the importance of understanding how they work.
How they work!!
Basic multiplication - Multiplication and division - Arithmetic - Khan Academy from Benton Park on Vimeo.
The idea of division - Multiplication and division - Arithmetic - Khan Academy from Benton Park on Vimeo.
Multiplication
One digit by two digit multiplication from Benton Park on Vimeo.
2 x 2 grid method multiplication from Benton Park on Vimeo.
Grid to formal Multiplication from Benton Park on Vimeo.
3 digit by 2 digit formal multiplication from Benton Park on Vimeo.
Division
division using arrays from Benton Park on Vimeo.
Division using a numberline from Benton Park on Vimeo.
Division Short Compact Method from Benton Park on Vimeo.
Start watching at 5.23