Add and subtract fractions - by a tape measure

Standard and modified ways shown especially for working with fractions of an inch. Learn and practice until you can do a three or a five term operation in under 15 seconds.

[@tannerrocha8710]

Man you taught me a lot here I am a welder and always take too much time doing the math. This right here saved my ass now. Thank you so much sir.

[@omarrios7176]

Same brother lmao

[@TurdJesus]

Starting school in the fall. This helps so much. Gonna be watching every KZbin welding video I can to be ready!

[@joserobles5614]

Great job man! Some people here can’t read or aren’t patient you know your math!!

[@gracielacornejo1973]

I learn a lot watching this video. Thanks for your help. I could never understand how to find a common denominator and this video did it for me. Thank you again.

[@GalaxyXLII]

I no nothing of this until I got this new job and I knew nothing about fractions or how they work. My boss got mad when I didn't know how to do all this. Well I hate to break it to him but not everyone knows a lot of math or fractions and so on. That's why I'm here now. Thanx man helped a lot

[@apprenticemath]

Thanks for watching!

[@apprenticemath]

2 and 1/16 - 3/8 = 1 11/16. Count the spaces between the bars, not the bars themselves. Every space is = 1/16, so every double space is = 1/8. Starting at 2 and 1/16, going back, jumping double spaces, you get first to 1 and 15/16, then to 1 and 13/16, lastly to 1 and 11/16. In total: 3 jumps of 1/8, or 3/8, 3 jumps of double spaces. Hope this helps.

[@DavidMartinez-fy3jc]

You just open my brain up. Thank you so much ...

[@apprenticemath]

No problems there. Make sure to type clearly so everyone can read and learn from. If any of my explanations don`t make sense to you, they won`t make sense to anybody else either, it is always my fault, I failed to explain clearly. So let me know when anything is not clear enough, and if you have ideas for future videos, post them too for all to see.

[@nawf_tx]

Thank you so much for sharing this, it has definitely helped me alot.

[@UnitTheory]

wow man thanks so much this video is amazing im tryin to get into a job and this is what they want me to know how to do

[@apprenticemath]

That is correct, good work!

[@melissalynn71]

thanks so much for the video and tips

[@The_Tradwife]

Save yourselves the trouble. The real video starts at 7:35

[@illiasimochko590]

Thanks man, nice vid

[@apprenticemath]

5/8 - 3/16 = 7/16 Nice work, count the "gaps" carefully between the small lines on the tape. Good idea about making a big paper tape, the only way to lear is with effort. Keep up the good work.

[@johndeyoung48]

great job i got it right away

[@UnitTheory]

thanks you seriously now i know how to do this

[@apprenticemath]

... quickly make 8/16 out of 1/2. Then count down very carefully from 4 7/16 to 3 15/16. This last bit, counting down all 8/16ths strains my eyes staring at a dirty tape on the job. So instead, I go 5 ¾ - 1 = 4 ¾, then count down ½ to get to 4 ¼. Then do the 4 ¼ - 5/16 = 3 15/16 part. I find there is less chance for a mistake if there is no fraction conversion (1/2=8/16), and my eyes need to count down only 5/16 carefully not 8/16, and it is easy to do and easy on the eyes the 3/4-1/2=1/4 part.

[@apprenticemath]

That`s right.

[@UnitTheory]

can you go straight down the fractions on the tape measure like you see how you skip around on them.you do the high numbers first on the subtraction ones is that so the smaller fractions take up less

[@apprenticemath]

Yes, you can go with the fraction straight down on the tape measure too. I went down with the big fractions or easy fractions first to minimize potential error. Say we have 5 3/4 - 5/16 - 1 1/2. If I subtract the 5/16 first from the 5 3/4, that = 5 7/16. Then I would need to subtract the 1 1/2 from this 5 7/16. I jump down from 5 7/16 to 4 7/16, then - this is the tricky part! - count down the left over 1/2 from this 4 7/16. To do it accurately, I would need to quickly make ...

[@jmejam_jmejam_]

3 15/16

[@apprenticemath]

That`s the idea with the channel: be more able and skilled, get better paying jobs. Good on you, bro. Make sure your efforts get recognized, have a properly registered apprenticeship and log your hours.

[@apprenticemath]

All good.

[@tablettablet7469]

How about if your measurement is in beyond single digits? Do you have to pull all the measure tape to count? Or is there a trick?

[@commandershepard7110]

I almost feel like we should discontinue literally any other method this is faster by a lot

[@dylangonzales8739]

Thanks

[@UnitTheory]

oh ok i got it now.is it alright if i need help with problems involving mathmatics i can ask you? cause you are really clear with your explanations i subbed you

[@UnitTheory]

now i need to know like whenever their is an 8th involved i always have to skip over 1 of the 16ths its every third bar is an 8th like if im at 2 and 1/16ths and minus 3/8ths i have to go back but skip over a line and thats how you do the 8ths ,so the answer would be 1 and 5/8ths

[@christophersanglitan7184]

very nice

[@UnitTheory]

1ft - 5/8ths= 11 inches and 3/8ths ?

[@UnitTheory]

ok heres another i did.2 and 3/16ths - 5/8ths= 9/16ths is this correct?

[@steveaustin6212]

Whomeasures 1/3 or 1/5 on a tape measure? 1/32, 1/16, 1/8, 1/4, 1/2 .....

[@apprenticemath]

Nobody on a tape, often in a kitchen.

[@thomashaley5084]

Hope you're still teaching

[@commandershepard7110]

That is so much easier than doing the math on paper

[@est-pj7so]

why 16 over 16?

[@apprenticemath]

Result needs a 1", that is 1 inch and 9/16.

[@UnitTheory]

heres another 2 and 7/8ths - 15/16ths= 1inch and 15/16ths

[@SombraLocs]

I know the trick on how to add and subtract fractions using a tape measure but I want to learn how to do it on paper.

[@Waafa]

You got to study even if you don't want to.

[@gertrudestrawberry]

Viewers, I'm not sure this is the best way to do it on site. It's error prone and hard to check for accuracy. You don't lose money on site because you spent 5 minutes out of a 480-minute day on a calculation. You lose money because you got the dimension wrong and now you need to go back to fix it. That first sequence of dimensions has 14 parts that need to be counted off on the tape. That's at least 14 opportunities for mathematical error alone, not including misreading the numbers or the tape. And then it can only be checked by counting over again (with the same probability for error, involving a higher distribution of errors of the same kind (this stuff has been studied) so that you're likely to repeat a wrong answer). Calculating this in your head doesn't take five minutes or even half of that with a good method and practice. If you can't hold the numbers in your head, then figure it with a pencil on the bare drywall, which is virtually as quick. If your job happens to involve doing this four times every hour, that's still only 6% of your day on calculation---no marginal gain to be had there. If your job happens to involve doing this 1,000 times a day, then you need a whole different system; go to your truck and use your laptop. BTW if you have to calculate a dimension from this many numbers more than once or twice, there is either a problem with the way you're laying out, or a problem with the prints. Here's an alternative method that's easy once practiced and can be checked for error: - Note the highest common denominator in the sequence (in this case, 16) - Go through the figures from left to right, tallying first only the whole numbers. Then go through again tallying only the fractions (in this case, 16ths). The fractions tally will only count the numerator. - When you come to a fraction that isn't in 16ths, just convert the numerator to 16ths first by doubling it as many times as required. (so, eg, 3/8 = 6/16; add 6). Doubling is easy, and one of the great facilities of the Imperial system. - Wait until the final figure in the sequence to add the whole number total to the fractional numerator total. In the case above, you'll have "3" whole numbers and "32" fractional numerators; the "32" is 16ths, and 32/16=2; so the final total is 3+2 = 5 You can quickly double check this by re-reading the figures you wrote down, or if you really want to be confident, cast out nines. You can look up "casting out nines" to learn that trick.

[@Natedoc808]

Man, if you are on any job site I’ve ever worked on without a pencil, you’re getting fired.

[@cris2068]

Do you know a tape measure I can by in 12ths

[@apprenticemath]

There could be one made by Mitutoyo, it's a machinists' ruler

[@UnitTheory]

2 and 1/8ths - 1 and 3/16ths = 15/16ths

[@TroijanSkinhead]

I missed most of it smoking a cigarette

[@JoseRamos-lt7vm]

"Since these fractions cannot be added, life does not stop" lol

[@rocketrider1405]

Or you could use (although, not right on the job site so this isn't that helpful) the a b/c key on a scientific calculator to enter the fractions as they appear and obtain the answer without first converting to a lowest common denominator. It's like magic, although it takes a bit of practice. Again, it's not something you could practically use at the job site 'cause you just wouldn't have time.

[@MrKen-wy5dk]

You may know fractions, but you sure don't know audio.

[@bigredswildrootjuice113]

OK so, Ive had a few, but I think I saw,. 75 1/3 of an inch. Plus. 25 1/4 of an inch. Is that not an inch. I think I just got dumber for watching a 15 min video on just dumbness. Dudes never held a tape.

[@apprenticemath]

Make sure you have a few more. Braincells. Keep looking for 1/3 inch with the remaing ones.

[@mattweber5242]

Bigredwildrootjuice I think you are the dumbass. This guy explained everything perfectly. You must not understand how fractions work obviously. I think you lack the ability to understand common sense.

[@user-cw5mj5zz9z]

this video its not related with your topic.a baby can solve like you.but u told on your speech that you will show to how solve Fractions without using paper.its totally disappointing

[@apprenticemath]

+Ashraful Islam The title say fractions, fractions are shown. Title says tape measure, a tape measure is used in the video. Title says add and subtract, video shows adding and subtracting. Sorry to disappoint, congratulations to your smart babies, super intelligence is clearly running in the family.

[@rocketrider1405]

Jump to the 8:00 mark of the video and the job-site method begins. You won't be disappointed.

[@rocketrider1405]

Opps ! I meant to say the 10:00 minute mark.