Mental maths is when you do calculations in your head instead of writing them down. Sometimes, it's just as quick to do calculations in your head as it is to write down every step. You can add and ...
Chris Tisdell has previously received funding from The Australian Research Council and the Australian Academy of Science. He has an educational partnership with Google and is a member of YouTube EDU.
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback