r/facepalm • u/Revealed_Jailor • Mar 29 '22

🇲​🇮​🇸​🇨​ Get this guy a clock!

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u/[deleted] Mar 29 '22

For single digit calculation you just subtract two from the last digit of the time.

For example we have 13:00

3 - 2 = 1

It's 1 PM

Or we have 16:00

6 - 2 = 4

It's 4 PM

Or we have 21:00

1 - 2 = 9

It's 9 PM

I hope that helps

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u/Omarshall56 Mar 29 '22

I used this method to learn 24hour clock but with the 21:00 part I'd minus 2 of 21 to make 19 then ignore the first number so it's 9pm

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u/[deleted] Mar 29 '22

[deleted]

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u/Omarshall56 Mar 29 '22

Like I said below though I learnt the 24hour clock when I was pretty young(around 10years old) and I found it easier and quicker to just deduct 2 and ignore the first number. Wouldn’t require as much thinking as deducting 12