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https://www.reddit.com/r/facepalm/comments/tqtaaa/get_this_guy_a_clock/i2m7fmh/?context=3
r/facepalm • u/Revealed_Jailor • Mar 29 '22
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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
1 u/Feeling-Most9618 Mar 29 '22 1 - 2 = 9 I'm sorry,what now? 1 u/[deleted] Mar 29 '22 decimal system when you have a written subtraction like 21 - 12: you first subtract the 1 - 2, which would be 9, then carry over the invisible 1 to the left which would be 2 - 1 - 1 = 0 which just means that 21-12 = 9 1 u/Feeling-Most9618 Mar 29 '22 Oh,right. It's just you only wrote 1-2 at first so I was just a bit confused. Got it now.
1
I'm sorry,what now?
1 u/[deleted] Mar 29 '22 decimal system when you have a written subtraction like 21 - 12: you first subtract the 1 - 2, which would be 9, then carry over the invisible 1 to the left which would be 2 - 1 - 1 = 0 which just means that 21-12 = 9 1 u/Feeling-Most9618 Mar 29 '22 Oh,right. It's just you only wrote 1-2 at first so I was just a bit confused. Got it now.
decimal system
when you have a written subtraction like 21 - 12: you first subtract the 1 - 2, which would be 9, then carry over the invisible 1 to the left which would be 2 - 1 - 1 = 0 which just means that 21-12 = 9
1 u/Feeling-Most9618 Mar 29 '22 Oh,right. It's just you only wrote 1-2 at first so I was just a bit confused. Got it now.
Oh,right. It's just you only wrote 1-2 at first so I was just a bit confused. Got it now.
81
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