MCAT Math Vid 3 - Multiplying and Dividing Complex Numbers Using Factor of 10 Trick

[@ayushikumar5594]

I cannot say enough how much you have helped me for the math on the MCAT. As someone who got straight C's and D's in math in HS, when I got to the MCAT math I was for sure screwed. You are a saint. You make the MCAT math look like a genuine joke - easy points question if I just know which formulas to use and how to apply them. THANK YOU

[@Leah4sciMCAT]

awwwwee! I'm glad the series helped you! Thank you for the feedback and you are very much welcome. You can do it! All the best!

[@PaytonCompton]

Are you in med school now? This is the exact boat I am in. I took a diagnostic and did so poorly on C/P because I have such poor foundational math skills. ): I was losing hope until I found this series.

[@Merryberry1750]

This just blew my mind... why was i never taught this! Thank you so much!

[@Leah4sciMCAT]

Glad I could help!

[@morganvague4804]

Oh my gosh, thank you so freaking much for creating this content and posting it! I cannot tell you how many practice problems, written explanations and tricks I tried to understand material like this. You make me feel like I can do math! The MCAT is actually starting to feel more doable now. THANK YOU FOR ALL YOU DO!!!

[@Leah4sciMCAT]

You're so welcome! So happy to have you in the Study Hall!

[@nightryder85]

wow been looking for this exact trick for multiplying and dividing decimals for the past 2 weeks lol. Thanks for the video =)

[@Leah4sciMCAT]

Ray D awesome! when are you testing?

[@hypnosstratagem1277]

This is amazing. Thank you so much for this. I have my MCAT in about 20 days and I am so grateful for your content!

[@Leah4sciMCAT]

That's just around the corner! Good luck!!

[@lenablueberry52]

How’d you do?

[@liz-ti2ke]

Thank you beautiful Leah

[@Leah4sciMCAT]

Oh wow, thanks! I do like a good super hero! :) Let me know how your MCAT turns out!

[@shahin2324]

These videos are super helpful. Thank you so much for putting the time and effort into making these videos!!!

[@Leah4sciMCAT]

You're so welcome! Glad to hear they are helping you!

[@ifynne1]

I'm thankful for you leah!!!.. I am planning on taking the MCAT for the 3rd time... I used Princeton and Kaplan to study those times.... I literally heard about you frm a friend yesterday and Ive already learnt so much watching ur videos.... Again thank you so much I'd be sure to sign up for the newsletter so I can get ur book Good Bless you!!!!

[@Leah4sciMCAT]

You are very welcome! I'm glad the videos are helping you. Are you referring to this book? leah4sci.com/ultimate

[@FaiienWings]

for myself: 2:34 (adding terms x100 and /100 to simplify 0.09x200 to 9x2). see done quick 7:51

[@Leah4sciMCAT]

Taking notes like this is not only a smart idea for your own prep, it will help others, too! Happy studying!

[@Stephanie-si5kn]

Taking the DAT soon and this saved my life! Thanks Leah!

[@Leah4sciMCAT]

Glad it helped! Best wishes on the DAT!

[@19jewels95]

You are amazing. Thank you so much for providing this invaluable resource ^^

[@Leah4sciMCAT]

+Julie Lam thank you

[@ccrackmyribs]

Yooo my mind is BLOWN. This is amazing!!! Thank you so much!!

[@Leah4sciMCAT]

You're so welcome!

[@sharinshafi3344]

Leah you are amazinG! Thanks so much for all you do for us Premeds!

[@Leah4sciMCAT]

+Sharin Shafi you are very welcome. Don't forget to thumbs up each video after watching

[@stephanieluu7049]

wow thank you so much!! this will help me so much and save me so much time not only on my MCAT but for the rest of my life!! WHAT A LIFE SAVER!!

[@Leah4sciMCAT]

Glad I could help!

[@AquaticLogic]

Your methods are scintillating, and I am so thankful for these videos!

[@Leah4sciMCAT]

+Funksolid you're very welcome. Glad to help

[@aaronrodriguez5454]

you're saving my life thank you so much

[@Leah4sciMCAT]

Glad to be a life saver!

[@khanruhafzah]

this is my favorite trick from you!!!!

[@Leah4sciMCAT]

Yay! Glad you like it!

[@Stephanie-si5kn]

Using these tricks for my DAT exam! Thanks Leah!

[@Leah4sciMCAT]

Happy to help!

[@ForlanElCapo]

amazing tutorials! im applying for australian medical schools, and our equivalent of the MCAT is GAMSAT, but the questions on physics and chemistry also usually require lots of maths without calculators. your videos have been such a great help!

[@Leah4sciMCAT]

Luis Suarez7 thank you :)I work with quite a few GAMSAT students so I'm familiar with the question types and higher level of difficulty. Glad I'm able to help

[@docmcdoc9575]

thank you! when I first started this video I couldn't figure out what you did but buy the end ! It was completely understandable! thank you!

[@Leah4sciMCAT]

You're very welcome! I'm glad it made sense in the end

[@lilianaramos1990]

Thank you so much for these great videos! How do you divide the decimals? I am trying to do the problems on your practice sheets, but I am getting confused.

[@Leah4sciMCAT]

Division with decimals can be tricky! Make sure you stop and watch my newest video on the decimal trick: kzbin.info/www/bejne/bnWuq2qMo9ZqhJosi=X8XFPhB5sYsjRKmo Then, if you're still having trouble, feel free to reach out to me through my website at Leah4sci.com/contact

[@paypay1970]

I am having the same issue! How do you do 33/0.11 with the decimal trick? The video didn’t explain it clearly, or maybe I missed something. I’ve rewatched it twice. All I’ve seen in the video is how to divide by numbers that are factors of 10 by moving the decimal left.

[@AmandaMagana]

you are literally the best!!!

[@Leah4sciMCAT]

Aww, thanks!

[@xokay915]

i cannot stress how grateful i am , thankk youuuu!!

[@Leah4sciMCAT]

+Kashaf Batool you're very welcome

[@diamondhiggins6714]

You have opened my eyes🙌🏾 thank you!

[@Leah4sciMCAT]

in a good way I hope? Glad to help

[@diamondhiggins6714]

yes of course : )

[@DofGreengables88]

This is so great! thank you!

[@Leah4sciMCAT]

You're welcome!

[@indirac93]

honestly i love all your videos, amazing work

[@Leah4sciMCAT]

thank you

[@dp_md]

My mind is blown right now. Blown.

[@Leah4sciMCAT]

Hopefully in a good way

[@ryanalani1262]

In 2024, watching this for the MCAT makes me wish I had learned these tricks back in high school or even college. TYVM!

[@Leah4sciMCAT]

you're very welcome and I completely understand! These tricks are time savers, but of course you need to understand the foundation before you go to the fast answers.

[@alyxkiernan3566]

You are seriously so amazing for making this!! Thank you!! my DAT is in about 3 weeks and I am struggling with the mental math in my Gen Chem section.

[@Leah4sciMCAT]

I'm glad you found my math series! Best wishes on the DAT!

[@R00567]

Love your videos, you rock! Thank you

[@Leah4sciMCAT]

R00567 thank you

[@jamilaholston4362]

Thank You So Much! Your channel has been a huge help so far. Please post more Physics Lessons soon.

[@Leah4sciMCAT]

You got it. I took a break last week but am back to posting videos 2-4 times a week. When is your MCAT?

[@jamilaholston4362]

September 18th, I will be on the lookout for your Math and Physics vids. They have been awesome so far.

[@Leah4sciMCAT]

Are you subscribed to my email newsletter? I send out links every time I post a new video, publish a new cheat sheet, study guide...

[@benirab8153]

Thanks for the help!

[@Leah4sciMCAT]

You're welcome, I'm happy to help!

[@Rebi333]

SO HELPFUL!!!!THNAK YOU!

[@Leah4sciMCAT]

You're very welcome

[@dwl2601]

The trick doesn't seem to work when you're dividing numbers?

[@Leah4sciMCAT]

The trick works for both multiplication AND division of numbers by a factor of 10. For example, in this video, I divided 89 grams by 1000 to get 0.089 For further questions on this topic, feel free to contact me through my website at Leah4sci.com/contact

[@classylilashley]

OMG LIFE SAVER. Thank you!!!!!

[@Leah4sciMCAT]

+Ashley Tschiggfrie you're welcome

[@Its_All_Fun_Bro]

This is glorious. God bless you

[@Leah4sciMCAT]

Awww, thanks! Glad you like it.

[@add8900]

Hi, is there a way to do this for division? For example, 0.05/100. You would have to multiply both by 100 correct?

[@Leah4sciMCAT]

use the 'move the decimal' trick

[@musicallie7945]

May God bless you girl may your every wish come true you have helped me alot

[@Leah4sciMCAT]

Thanks so much, I'm glad to know my resources helped you!

[@anawesomecooldude]

Neat trick. I didn't know of that one before :)

[@Leah4sciMCAT]

glad you like it, this is one of my own and coincidentally one of my favorite

[@michelleaugustinas4775]

Thanks! This really helped!

[@Leah4sciMCAT]

+Michelle Augustinas you're very welcome

[@SuperKuku24]

This is great ..The only thing killing me on mcat is math...smh..Thanks sssoooo much....have 4 weeks before my mcat

[@Leah4sciMCAT]

Kwaku Assiamah 4 weeks should be enough to go through the entire series more than once, practice, and then go back to your old tests and redo the math-related questions to ensure you have it

[@mss12004]

can you put video of division for complex numbers, this one gave mostly multiplying examples and divison was only power of ten . so what one do for 15/60 or 335/444

[@Leah4sciMCAT]

I'm sorry, but I don't offer tutoring through KZbin comments. For more help with MCAT math and other MCAT sciences, I recommend joining the MCAT study hall. Full details: leah4sci.com/essentials

[@benblack742]

This is helpful but misleading because this does not work for division it only works for multiplication. 1.5/20 is not the same as 15/2 so this trick does not work for division. It would be great if she could do a video explaining how

[@Leah4sciMCAT]

You're correct. To solve something like this, you would need to do the same operation in the numerator as the denominator. Such as, 1.5/20 equals 15/200. For help with questions like this and more, I recommend joining the MCAT Study Hall. For more details, visit join.mcatstudyhall.com/ or contact me through my website leah4sci.com/contact/

[@devikanair44]

do you have like worksheets or practice problems we can use? it would be so helpful!! thanks for this, your videos are super helpful!

[@Leah4sciMCAT]

For access to all of my materials, visit my website: leah4sci.com

[@hanaeelkholti5473]

THANK YOU !

[@Leah4sciMCAT]

You're welcome!

[@laylasuleiman1112]

THANK YOU FOR THESE VIDEOS :D YOU ROCK

[@Leah4sciMCAT]

You're very welcome!

[@dastui101]

Thank you so much, such a great video! :)

[@Leah4sciMCAT]

+Jason Taylor You're very welcome

[@lm28810]

Omg you are amazing

[@Leah4sciMCAT]

Thanks so much!

[@rosannaalexis]

you're amazing, thank you!!!

[@Leah4sciMCAT]

You're so welcome!

[@jake9187]

Awesome TY !!!

[@Leah4sciMCAT]

You are very welcome

[@mojoboogiedaboog]

Holy cow this is a game changer

[@Leah4sciMCAT]

Glad to help!

[@chrisguerra2020]

Love your videos! they are helping me out big time. I have a question tho how would you do this for division . Like 8g/1 x 1mol/40g ? Doing the trick I got 20 but it should be 0.2

[@Leah4sciMCAT]

I'm sorry, but I don't offer tutoring over KZbin comments. For help with this and more, I recommend joining the MCAT study hall: join.mcatstudyhall.com/

[@itzamarechevarria8529]

Hey do you have any trick if de division it’s a propel fraction. The dividend bigger?

[@Leah4sciMCAT]

For more questions and information please contact me through my website leah4sci.com/contact/

[@ouranFan98]

thanks queen

[@Leah4sciMCAT]

You're very welcome!

[@raclj9940]

i dont even know where to start - i am self studying now with zero sci background besides bio. I plan to take mcat next year and for now, this is so demoralisisng. Thanks for your vids though.

[@Leah4sciMCAT]

You're so welcome! I'd love to help you even more. Start with my free prep guide: leah4sci.com/ultimate and then contact me with any questions you have: leah4sci.com/contact

[@adamkatz6532]

would you consider doing one on social/psychology sections?

[@Leah4sciMCAT]

Adam Katz Do you mean a video?

[@adamkatz6532]

Leah4sciMCAT yes!

[@Leah4sciMCAT]

Adam Katz most likely yes but down the line. I have much more experience with the sciences like chem/bio/orgo... so I'm trying to build up that library first

[@adamkatz6532]

very cool. math segments are a tremendous help

[@reenanwa]

will the multiple choice answers have different units?

[@Leah4sciMCAT]

On the real exam, they could! It depends very much on the question being asked.

[@kamala478]

How would you do it for percent composition questions? For example I was given 40.9% of carbon, 4.58% of H, 54.52% of Oxygen with molar mass of 264. It says to find empirical formula and molecular formula. I tried your trick with Carbon only. Instead of (.409 x 264)/ 12= 9 mol. I rounded .409 to .5. I moved the decimal to the left once = 5 and moved 264 to the left one decimal = 26.4, but rounded it down to 26. I divided it all by 10 because i rounded the 12 in the denominator down. But the final number is no where close to 9 ( if used by calculator), it comes to around 11. Wouldn't this throw my whole formula off? I'm probably rounding it the wrong but if you could guide be that would be great!

[@Leah4sciMCAT]

You rounded by 20%. Try 0.4/280 or something similar

[@stephaniasanchez-tarre3604]

you are a G!!!!!!!!!!

[@Leah4sciMCAT]

Thanks!!!

[@fatimazaim503]

hi . I just wanted to ask what would you do if you have 10.5 multiplied by 10.5

[@Leah4sciMCAT]

At which part of the video? (timestamp)

[@fatimazaim503]

its not part of the video . its a random question

[@Leah4sciMCAT]

I'm sorry, but I don't offer tutoring via KZbin comments. For help with this and more, I recommend looking into the MCAT Study Hall. Contact me for details: leah4sci.com/contact

[@karlavalcourt2499]

I find mental math to be challenging. How would you go about doing long division problems? For example: 7/286. This video didn't really address that. Thank you for the video.

[@Leah4sciMCAT]

Mental math can be tough! Contact me through my website leah4sci.com/contact/

[@tunneltrance]

this is genius

[@Leah4sciMCAT]

Glad you enjoyed it!

[@Rebi333]

how do you divide 1.8x10-10/1.6x10-2 with your method? the answers choices are very close together ex. 1.1, 1.3, 1.4 x10-8

[@Leah4sciMCAT]

the MCAT will not give choices this close

[@angelghaemi]

I love you! lifesaver

[@Leah4sciMCAT]

Glad I could help!

[@Priyapotato]

🙏❤️💕💞 dear god, Leah, thank you so much!! I hope my love and gratefulness reach you!! I can not explain how helpful this was!!

[@Leah4sciMCAT]

Awww, you are so welcome!

[@mamoo2337]

I thought that order of operations with multiplication and division goes from left to right?

[@Leah4sciMCAT]

Thanks for the question! That’s correct. When it comes to the order of operations, multiplication and division hold equal weight. In complex problems, you do whichever comes first in a left to right order. However, if no other operation is present in the calculation, you can really multiply or divide in any order and STILL get the same answer.

[@mamoo2337]

Thanks so much for clarifying Leah :-)

[@patrickp4571]

Thank you! these videos are like witchcraft

[@Leah4sciMCAT]

you're welcome :)

[@psalmsgrant2766]

how would you multiply 0.866 × 0.2?

[@pinkpurpleroses3534]

psalms grant You round 0.866 to 0.9 and then multiply by 0.2 to get 0.18, since we rounded 0.866 up to get our answer, our answer should be less than 0.18 Refer to her first video

[@psalmsgrant2766]

Thank you so much

[@pinkpurpleroses3534]

Np :)

[@Leah4sciMCAT]

For the MCAT, close enough is good enough. 0.866 rounds to 0.9, then apply the decimal trick. 0.9 x 0.2 is 9 x 2 = 18 with the decimal going back twice for 0.18

[@andrewmuse8541]

this shit is legendary. big up

[@Leah4sciMCAT]

Glad you liked it!

[@MartialXD]

Wouldn't it just be easier to convert to scientific notation and solve? This method seems likely to lead to errors under pressure

[@Leah4sciMCAT]

It depends on the individual. I'm sharing what works best for me, but you do whatever is quickest and easiest for you. :)

[@moustafaelbatawy1099]

For the 18 N couldn’t u have rounded the 0.089 to 0.1 * 213 and ended up with 21.3 N ????? And thank you :)

[@Leah4sciMCAT]

could you point the timestamp for this please?

[@asaplocky]

i love u

[@Leah4sciMCAT]

Thank you

[@mahmoudhadhoud9133]

This is very good but if someone does not know that 5 divided by 5 is 1. They should not take the MCAT.

[@Leah4sciMCAT]

Glad you liked it! My goal is to not only explain the methods, but to make sure students understand why the method works.

[@lavender94x]

This was great. Thank you!

[@Leah4sciMCAT]

you're very welcome