The Sharp EL-W535SA (as well as the EL-W506T and the Sharp S25 Junior Quiz calculator) all have a mental maths practise function. This function asks the student a maths question (within a certain set of parameters).
Watch the mental maths how to video to see what happens next:
Oh my goodness, what else can this calculator do?
Watch normal mode videos to find out
Want the calculator?
Yes you can, download the simulator today to start playing (works on all windows based systems).
Get one physically:
But not a scientific one, its too complicated for me..
The Sharp S25 was designed for learners in primary school. It has all the basic functions a student would need, 10 digits, and the mental maths practice function – making the calculator both a helpful learning tool, and a helpful checking tool.
The mental maths practice function works in a similar way to the one in the mental maths how to video shown above.
If this is something you want, you can purchase it from
And other good stationery stores.