UIL High School Number Sense Test A from 2020, Mental Math Contest

In this video, I will explain step by step how to mentally solve problems 1-20.
Also, as a bonus, I will solve 3 additional problems from the second column.
UIL Math Contest; UIL Number Sense
Mental Math contest
Math tricks and shortcuts
How to square numbers mentally
How to multiply numbers mentally
Mental math approximations
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Видео UIL High School Number Sense Test A from 2020, Mental Math Contest канала TheNumberSense