Title: Learn how to calculate faster than the speeding calculator
Resource Type: Website
Link: http://www.glad2teach.co.uk/fast_maths_calculation_tricks.htm
Reasons for recommendation: This website teach us everything about mental calculation and if one were to memorise all the formulas in here, he/she will be very fast at mental calculation because this website has a lot of formulas and tricks for us to learn. This website is a must try for everybody.
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