Having had suffered a minor stroke these simple math problems have taught me to remember math problems. I worked as a land surveyor for many years. I felt really good solving this almost instantly. In geometry the the angles are measured in hours minutes and seconds.That has nothing to do with the fraction problem but it was a major advance in my mind because I could picture it.🙂
I got 3.30 (AM) that was silly. Converting 24 hours to minutes, then divide by 8 and multiply by 3. Need to try again. I guess it helps to calculate with 24 hours in a day instead of 12.
My grandson is 4 and he tells time to the 1/4 hour because of the Westminster Chime clock. He even knows the sequence of the bells; A, BC, DEA, BCDE+Hours.
13mm per 1/2", and 3/8" is a bit less than 10mm, so about 5/13 of a day, which is a bit less than 5/12 of a day, which is about 10am. So a bit past 10.
Regarding the percentage "bonus" example. How I picture it mentally goes something like: 25% of 200 is 200% of 25. Which is 50. Not a great example of the commutative property being useful, since ¼ of 200 is pretty trivial, but it can be a useful method in mental arithmetic in some situations. if we want x% of y, where y is a nice fraction of 100, the mental arithmetic can be much easier if we switch it to y% of x, then express y% as a fraction.
25% of 200 doesn't need special treatment because ¼ . 200 is quite easy. But 17% of 300 is perfect to swap the numbers. For those who don't understand the swap here is the explanation: 17% = 17/100 so 17/100 x 300 = (17 x 300) / 100 = 17 x 300/100 = 17 x 300% = 17 x 3 = 51
I’m visual. I looked at midnight to noon four parts. 1-3 is one part 3-6 second part 6-9 third part and 9-12 fourth part. Then noon to midnight four parts (same break down) =8 parts Back to midnight I went three parts which is 6-9 ending at 9am. Crazy enough it took me only seconds to do but much much longer to explain 😂
Easy..... 9 a.m. 1/8 is 3 hours so it's 3 + 3 +3; Oh, no I did not imagine any clocks....I devided 24 hours by 8 which is 3; 1/8 is 3 hours so 3/8 is 9.... pure numbers.... no clock.
If a student didn't immediately recall 8 is a third of 24, then they might divide the top and bottom by 2 to get 4 hours, then multiply by 3 to get 12 hours. Then hopefully remember a day is 24 hours, not 12 hours, and multiply again by 2 to get 9/24. And then hopefully remember this is AM not PM.
Whaaaaaaaaaatttttt????? You started 12,674 other videos with "Okaaaaayyyyyy". Now you think it is acceptable to say ""Alright"? Noooooooo Mr. UA-cam Mathman, that is not acceptable! I think you need to edit this video immediately!
Having had suffered a minor stroke these simple math problems have taught me to remember math problems. I worked as a land surveyor for many years. I felt really good solving this almost instantly. In geometry the the angles are measured in hours minutes and seconds.That has nothing to do with the fraction problem but it was a major advance in my mind because I could picture it.🙂
Got 9 2 seconds.
24/8 = 3 so 3 X 3 = 9
Thanks for the fun.
Pretty easy, isn't it?
@@47AndyT
Partial credit. You didn’t specify AM.
8 goes into 24 3 times. Therefore 3 x 3 is 9
Thus it will be 09:00 hrs or 9 am
3/8 = 9/24 = 09:00
I got 3.30 (AM) that was silly.
Converting 24 hours to minutes, then divide by 8 and multiply by 3. Need to try again. I guess it helps to calculate with 24 hours in a day instead of 12.
Very easy brain candy. 24/8=3 3X3=9 Of course it could be set up as 3/8 X 24/1 to get the same result: 3/8 X 24/1 = 72/8 = 9
My grandson is 4 and he tells time to the 1/4 hour because of the Westminster Chime clock. He even knows the sequence of the bells; A, BC, DEA, BCDE+Hours.
Your grandson might like an old piano piece, "Big Ben Boogie," by Winifred Atwell. It's on YT.
Hello from Israel
How are you all?
All I did is this :
3/8×24
= 3/8×24
9
I got it by 1/8 of 24 hours = 3 hours X 3 = 9 hours into the day = 09:00 hours.
13mm per 1/2", and 3/8" is a bit less than 10mm, so about 5/13 of a day, which is a bit less than 5/12 of a day, which is about 10am. So a bit past 10.
When people ask me for the time, I like to say nonstandard fractions like, "it's a third to four" or "it's a fifth past noon".
My very quick calculation says 9 AM. Took about 2 seconds to solve.
Regarding the percentage "bonus" example. How I picture it mentally goes something like:
25% of 200 is 200% of 25. Which is 50.
Not a great example of the commutative property being useful, since ¼ of 200 is pretty trivial, but it can be a useful method in mental arithmetic in some situations.
if we want x% of y, where y is a nice fraction of 100, the mental arithmetic can be much easier if we switch it to y% of x, then express y% as a fraction.
25% of 200 doesn't need special treatment because ¼ . 200 is quite easy. But 17% of 300 is perfect to swap the numbers.
For those who don't understand the swap here is the explanation:
17% = 17/100 so 17/100 x 300 = (17 x 300) / 100 = 17 x 300/100 = 17 x 300% = 17 x 3 = 51
@@panlomito Yep. It's definitely one of those "sometimes it's useful, sometimes it's not" mental arithmetic tricks.
Thank you
I’m visual. I looked at midnight to noon four parts. 1-3 is one part 3-6 second part 6-9 third part and 9-12 fourth part. Then noon to midnight four parts (same break down) =8 parts
Back to midnight I went three parts which is 6-9 ending at 9am. Crazy enough it took me only seconds to do but much much longer to explain 😂
Ditto! 24 ÷ 8 = 3 hours per eighth.
3 x 3 = 9 (am). Done.
Maths dunce here (and I'm not exaggerating!). I solved it in less than a minute.
(3/8).24=9 Morning 9 AM
These are good 👍
That would be about 4 considering my average day.
09:00 hours.
Easy..... 9 a.m. 1/8 is 3 hours so it's 3 + 3 +3; Oh, no I did not imagine any clocks....I devided 24 hours by 8 which is 3; 1/8 is 3 hours so 3/8 is 9.... pure numbers.... no clock.
3/8×24
9am , also about 2 seconds .
1 day = 24 hours
3/8th of a day =
24x3/8= 9 hours.
Then the time is 9am.
3/8 th of a day means 3 hours.
9am in about five seconds in my head. Sorry it took so long.
If a student didn't immediately recall 8 is a third of 24, then they might divide the top and bottom by 2 to get 4 hours, then multiply by 3 to get 12 hours. Then hopefully remember a day is 24 hours, not 12 hours, and multiply again by 2 to get 9/24. And then hopefully remember this is AM not PM.
9 am
3×24÷8=9
0900hrs
3/8 of 24= 3/8 x24=3x3= 9 hours of the day gone means it is 9am.
24 hours/day
3/8 day × 24 hr/day = 9hours
9hours = 9am
3AM
But a day is longer than 8 hours.
3/8 x 8 = 3AM.
I’m going to say 9am maybe. I’m on meds so I could be wrong.
9 AM.
is that am or pm
9 am
9 a.m.
Its Tuesday
It's Tuesday, so this must be Belgium.
3/8 = 9/24 so 9 am
Whaaaaaaaaaatttttt????? You started 12,674 other videos with "Okaaaaayyyyyy". Now you think it is acceptable to say ""Alright"? Noooooooo Mr. UA-cam Mathman, that is not acceptable! I think you need to edit this video immediately!
Oops, it’s 3x24/8=9
09:00 . . . 7 nanoseconds.
WOW.
😂
9 a.m.
9 am
9 am
9 am
9 am
9 am