Numeracy in the mind – it’s not a talent, and not a gift. It is simply knowledge of some mathematical tricks. Now you will have additional knowledge that will help you use your mental abilities a bit more efficiently.
5 more Math tricks to Amaze your tutor
Trick #1 Tip counting.
If you need to leave a 15% tip, there is a simple way to do it. Calculate 10% (divide by 10), and then add the resulting number to its half and get the answer:
15% оf $25 = (10% оf 25) + ((10% оf 25) / 2)
$2.50 + $1.25 = $3.75
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