Video help files: example addition subtraction multiplication #division# parenthesis signed parenthesis creating numbers strategies
Static Help: 23-15 274+162 25-18 12*12 324/18 (5+2)*3 -(5-10) 9998 => 9998+2-2 98*98
Download page direct download
Animated help files: Example: 98*98
Creating pairs positive-negative: to simplify the work with nummòlt

Double click to explode or to regroup 10 by 10.
Double click in the window to erase the parenthesis.
Right click to create pairs of numbers

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Video help built and converted to swf with: CamStudio: