Видео ютуба по тегу Math Shortcut

How to Calculate Faster than a Calculator - Mental Maths #1
How to Calculate Faster than a Calculator - Mental Maths #1
Trick To Always Remember Your Times Table (6 to 10)
Trick To Always Remember Your Times Table (6 to 10)
10 Math Tricks School Didn't Teach You But Should Have
10 Math Tricks School Didn't Teach You But Should Have