Math Trick - multiply with lines - the five zero edition

[@Tania-yp5qo]

I am a 47 year old with dyscalculia and I dearly wish I had known this at school. Now I'm doing my functional skills as part of a qualification and you've NO idea how much this has helped. I work better with diagrammatic workings out so this is a life saver!

[@vanitas5097]

i hope u improve

[@AJROtheWriter]

Thank you Mr. Guy from Australia who is not Chris Hemsworth but clearly is still a God of Math! AT LAST I CAN MATH! Thank you for your "Ability to Math Restored" Blessing!

[@ollybranford]

Thank you so much! I have struggled with maths all my life and this is the first time that multiplication has made sense.

[@laureng1990]

mom of a 3rd grader who is already doing algebraic equations...multiplication has been so hard for him to grasp..learning this so i can teach him...THANK YOU (I feel like a lost puppy after being out of school for so many years)

[@FancySassy80]

thank you for this.. made my question about zero's go away.. since i'm teaching my girl.. she watched this with me and paused everytime she had a question and I was able to explain it to her.. :)

[@TechandDoc]

finally a use for 4 color ball point pens!!!

[@marisolgomez5579]

Lol now I know what they for 😂😂

[@no1mqfan9158]

😆😆😆

[@F7actured1832]

Haha!

[@jacobestremos7453]

Lol

[@reizinhodojogo3956]

my friend haves one of these

[@kimgodman126]

i dont want to be too dramatic, but i think you may have just helped me pass math! im even tempted to re do my gcse's :D this is amazing! thanks for the video =]

[@missnevermind200]

He sounds so happy and excited whenever he reveals a secret trick, it’s adorable ☺️

[@aayushsharma7334]

Everyone deserves math teacher like him

[@thecalendarninja]

This is really amazing 👏! What I do, to simplify it even further, is I noticed we can even reduce the amount of intersections to count even further by using a separate color for each digit that's different in the problem. For example, (937x26) I'll use blue for 9, red for 3, green for 7, black for 2, and purple for 6. I write them down, and then just have a super easy and fun time solving the problem! I used to think we have to use colors for 0 or multiples of 5 or 10, 100, and so on, but I noticed just by trying it out that it works with any number you want! After thinking it through that should be obvious, and it teaches multiplication and addition in a visually clean and easy way.

[@PatitoBandito]

i wish they taught this in the American school system, makes simple multiplication fun and visual

[@jadewadham7999]

You have really helped the kids in my class (and me!), thank you very much!!

[@AkatsukiLoverX3]

This is awesome! :D I'mma outsmart my teacher with this, and hopefully do better on my finals useing this method. I'm hopeless with multiplications, and this is a nice lifesaver while I learn to get better at it! TvT Thanks!

[@maipandas6600]

This is amazing! Thank you so much! I'm definitely going to show this to my peers who struggle.

[@neatski8378]

THANK YOU !!!!! THANK YOU !!!!! - I watched your other video, and was hoping there was one on the big numbers and "0" Having a learning problem my whole life, ( i am now 35y.o) I feared maths esp Multiplication .. I am one happy camper this morning I now can do long multiplication :D ..... Thank you so very much.... Yes others may be right bout it being longer to do it this way , However I am not others, I could never learn the way teachers taught and to be honest for me this is quicker, and more accurate ..... Thank you again from the bottom of my heart ....

[@animationpurple1345]

Anita Markna i’m 5 and i know devision🤣 (TRUE!)

[@DeansVideoClips]

I am exactly the same way Anita. Not stupid by any means but failed at school... KZbin has been my saviour - I'm just soaking up an education now. Many academics are just people with good memories so life is easy for them especially exams and certificates, etc. but they learn by rote and don't truly understand and rarely have the ability to solve complicated problems if they have not been taught how to.

[@mulelady1]

You need to realize that not every person has the capacity to multiply mentally.

[@raspberrymilq]

Bess Wall you have to realize this isn't meant for everyone...

[@themessenger8131]

Yeah Multiplying mentally with huge numbers some can't be remembered.

[@johnnyendoscope8743]

what are the circles if i want to calculate for example 146*285?

[@sarmadsaeed6235]

(200x12)+(7x12)=2400+84=2484 my way of doing Last one was helpful. TY

[@IntoAllTruth.]

(207 x 10) + (207) x 2 = 2070+414 = 2484.

[@gotahgemini6415]

Thank you for sharing your tricks and knowledge! God bless you.

[@ronaldjorgensen6839]

thanks was always fascinated to see it better

[@ropss16]

Hi how do you know which parts are together when you circle them example : 6:10

[@syedwazif9715]

love it. I did this on my exam and everyone was like whaaaaaattttt......?

[@noorhassan4361]

Syed Wazif lol

[@rogelioporsuelo8126]

i had a better technique using the power of math

[@Ivy-dd8bf]

@@rogelioporsuelo8126 Lol, this is also the power of math, its just a simple way for more visual people to stack numbers.

[@Eric_Dan-6_MD_PhD]

It is better to put a line and its numerical value (like a line valued 9 as ONE line with a number 9 on it) instead of a line of 5 and 4 line in parallel. like anything else one need some practice before evaluating whether it is good/fast for him or not.

[@cherrypicker777]

You have no brains. xD JK

[@Jim361tx]

I am terrible at factoring... This is amazing thankyou

[@MaryAnnNytowl]

I remember just _ever so briefly_ going over this in school! I think we covered it about as quickly as we covered the abacus usage, a few years earlier. 😄 All for us to blow right past it to do it the "regular" way...

[@tufflamb]

Do you keep it there when there’s 2 digits on the first section? Example: 99x99

[@MaryAnnNytowl]

Your first number, the ones, would be from the first set of crossings from the right, the second place, the tens, would be from the next crossings from the right, and the hundreds place would be the next sets of crossings. In your example, there would be a 5s line & 4 1s lines, twice, for 99, and crossing those would be a 5s line and 4 1s lines, also twice, for 99.

[@noelharibugingo6329]

Thanks you for teaching me 🙏

[@thebigresh3889]

Nice Work! Very useful!

[@MoonLaceyButterfly]

It’s very interesting, the steps are essentially the same as adding “x’s” to the next step using traditional American mathematics (then adding everything up). However, this definitely provides a helpful visual aid.

[@MsJamilaaa]

brilliaaaant thanks a lot for uploading :)))))

[@theohaywood4199]

Can this be done with division problems with and without decimals. E.g 112/14 or 147/9

[@jeffreycastro4891]

What do you do when the number is greater than Zero in the tens place like 632?

[@ShivamSingh-zk5nq]

Very good! If people dont have colour pens they can give values to the lines by just writing veside a line its value and then multiply to get intersections. its great.

[@Rwafflezcool]

Are you British

[@hydraoverpowered4599]

thats so helpful cant wait to tell my classmates how did i get my fast multiplicating skills and by the way what if t has decimals?

[@akhyasingh3688]

Everything would be same just put the decimal point 1 digit or 2 digits According to the question.

[@marciebarnes4422]

This is going to help my son tremendously

[@liamwright5021]

What about doing two three digit numbers like 214*132?

[@sweetswirl]

What about two zeros in one number?

[@innercirclejwh]

im gonna really enjoy teaching this to my son who loves maths, thank you!

[@nathalie_desrosiers]

How it went? Before I teach it to my son...

[@ZakarooNetwork]

Nice One Mate!

[@willonzeleznik2440]

How am i supposed to do with number under 10 like 6 x 7, 8 x 9 etc

[@runninurul]

Thank's for the lesson. It's so amazing!

[@sumaket]

Thanks mate, usefull method to be aware of. later !!

[@tinyrex9911]

I used this to answer another question I had. you can multiply single digits by placing a zero in front of them. aka 5X4 would be drawn as 05X04 and the method works just the same.

[@tinksno1]

+Tiny Rex you don't really need the zeros, you can just draw 4 lines in one direction and a line representing 5 in another then you would count the four intersections by counting up in fives, 5, 10, 15, 20. And there is your answer, don't overcomplicate it for yourself! :)

[@tinyrex9911]

tinksno1 I know i typed "5X4" just as a random example but if you use the "zero line" then you keep the proper spacing for when you circle the sections for your answer. That is the reason the zero line is used at all, to put the intersections in the right locations. I appreciate your response and of course I know what 5X4 is without drawing any lines , I was just clarifying how to maintain spacing for anyone using this method.

[@alexandraputz9667]

+Tiny Rex Just use 05x14 as your example then. 05x04 just doesnt make sense. Also if you keep the angles of the lines right, the intersections should be easy to locate, as they should be from top to bottom in one line. If not maybe quad paper might help you ;)

[@tinyrex9911]

Alexandra Calvo Look, I've tried to be nice but you are wrong! If you don't understand the concept that there are quadrants where single digits and tenth's and hundreds must stay then don't try to correct me when I'm right and you are wrong. You cannot simply draw four lines anywhere they have to be spaced properly as I said or they will not line up. graph paper has nothing do do with it and you need to stop spreading lies on my post or I will erase your comments.

[@vi6104]

Very easy and I like it 🎈🎈🎈

[@K.114.]

how do you do problems like 12x142 or 14x251? more than two digit numbers????

[@StarvingOat]

His other video.

[@sasubillirajesh5786]

how do we get for 3 digit number multiplied by itself ?

[@ester6135]

I got confused on 109×72. But I love watching ur videos I got better a math!!!

[@luminousmusic1911]

I Like this a lot!! is there on for dividing?

[@renverganio3637]

Well this will help with my struggles of memorizing multiplication

[@Jetagenetworks]

Hi! How do you multiply 5760 by 35 using this method? Thanks!

[@Brian67588]

Could you have two 5 lines and a subtraction line for a nine?

[@jigglypuff7004]

how would you draw 27x339 ?

[@katlegoramasesane2133]

i live in botswana and showed it to my teacher and it was new to him

[@turdferguson5392]

Thank you teaching my 8 year old this method now

[@brendastuckey1939]

Very helpful. ? What if you have a problem that has "0" at the end like 200x70 or 250×70? We are a little confused. Thank you.

[@MendelsonShape]

If you have different coloured pens, use, blue (for example) for the counting numbers and green for the zeroes. Draw the lines for the zeroes as you would for the counting numbers and separate the intersections. The first two intersections have no counting numbers, so they are both 0. By adding the others and carrying where appropriate, the answer to 250 x 70 will be 17,500. I am NOT a mathematician and this worked for me! Thanks for posing the sum; it gave me a chance to work it out. I hope my explanation helps.

[@brendastuckey1939]

THANK you Elliott😊

[@MendelsonShape]

My pleasure.

[@bidhanhajong1118]

@@MendelsonShape 100 ×100=10000..show me

[@panchoroldanz]

In relation with the operation in 7:33 I made a comparison between this method and the classical, the classical is faster than this. I understand the gread advantage of learning alternative methods but this one is not a better in many cases. Anyway I like it

[@marisolgomez5579]

Very helpful

[@danielsanchez7824]

I'm confused in the tens part...I don't see why you started with 25....can someone please explain this?

[@tatilacayo1176]

Does this method work for any multiplication table?

[@tecmath]

It does, but can be messy. Try this way! kzbin.info/www/bejne/n6LCdHWBlNasmpI

[@miguelsanders5389]

can u do like 1243x345?

[@vinodpawarsir]

Nice method

[@zakimohamed2103]

this great it help me on my math test

[@xboydubose7254]

What if you don't have a different color?

[@gluonone]

use squiggly lines/zig zag (sawtooth)/lines that look like a spring...etc

[@thomaslynch7318]

what do you do for decimals?

[@wazif1786]

ikr. Maybe you can can take away the decimals and then add them back again. Although, if you have something like 5.5x5.9 you cant

[@azuregriffin1116]

I'd multiply each decimal in to a whole number, then at the end shift them back. So if you shifted by 9 in one number and 4 in the other you'd go back 13 spaces in the end.

[@Trainboy1EJR]

OH NO! I lost my 4 color pen!

[@isaacd7095]

Trainboy1EJR that’s not good

[@ulysses_grant]

Great video! It seems like it's a good trick to know about, but not that useful if you need to calculate fast.

[@tippi4615]

Thx! Nice trick

[@xLurycz]

What if two '5' lines cross? I had that happen and it got a bit confusin. I got two different answers, 13 and 54.

[@manuelmatteo6771]

what was the question

[@manuelmatteo6771]

***** must be 54 then

[@anushkasingh4127]

Thank u 😊😊😊😊

[@hagancameron]

how would you go about 99x99? I can almost see how you get 9801 but the rules to follow allude me.

[@tecmath]

A lot of lines.

[@muhammadeesa265]

well done that helps me sooooo much

[@khalidkhalif828]

How can you do this 120×203

[@Beos_Valrah]

imgur.com/dCMd7p7

[@meforsure]

I would use a 3 as a different color as it would be more useful and will eliminate more lines.. Thanks for the TIP will use it next time!

[@alexandraputz9667]

+meforsure Just more difficult when some of those lines collapse, then you have to calculate those multiplications, even if they're rather easy. And 5s nicely add up compared to 3s.

[@stupiditydumbdumb5829]

OMG THANK YOU SO MUCH THIS HELPED ME ALOT

[@FerdousAlam1206]

Amazing

[@Setyrrr]

Thank you

[@TheSpeedcow]

If everything that intersects with the 0-line is just multiplied by 0, what's the point of having it? Is it just something to help you visualize the question?

[@onciblu]

+TheSpeedcow so you don't skip a zero

[@tinyrex9911]

+TheSpeedcow it is keeping the proper spacing for when you circle the areas to get the answer.

[@tinyrex9911]

+TheSpeedcow You can multiply single digits by drawing them as a a two digit number starting with zero. ie 05 instead of 5.

[@LT53]

Damn, I didn't know Surge was a math teacher.

[@TheAcacia1984]

how would you get the correct answer for 403 x 203 ??

[@majedahmad1171]

seriously. how??!!

[@MaryAnnNytowl]

A set of 4 lines, a "zero" line, and a set of 3 lines. Going the opposite way, a set of 2 lines, a "zero" line, and a set of 3 lines. The 1s number would be where each of the #3 lines cross, totalling 9. The 10s number would be where 0 lines cross, so it would total 0. The 100s number would be where the 3 & 2 cross + a 0 line crosses + the 4 & 3 crosses, (6+0+12) which would equal 18 (carry the 1, so 8). The 1000s number would be where they cross a 0 again, so 0, and add the carried 1, so 1. The 10K number would be where the 4 & 2 lines cross, so 8. The grand total would then be 81,809. This was harder to explain in words than with the visual aids, so I hope that makes sense!

[@ronaldjorgensen6839]

is exponent math doable

[@marku2535]

What if you can only multiply 302×8?? Help!

[@muttfacemcderp980]

I changed your question to 302x3 so I didn't have to worry about 5x lines 302x3 This automatically assures you have 3 groups of intersections, because the larger number decides how many there are. so that means you go by the columns. 1's, 10's, and 100's. In this equation, you simply count the intersections for each group. 1 = 6 10 = 0 100 = 9 906 Though, I suppose if you went with your 302 x 8, you would get something like this. 1 = 16 10 = 0 100 = 24 Now, we just follow the basic principle that a column can not have a value over 9, or under 0. That means the new values are 1 = 6 10 = 1 100 = 4 1000 = 2 2416 Personally, I find it easier to do equations like this without tilting the "Box" as it lays out your columns very easily. smallest value horizontally, largest vertical.

[@bidhanhajong1118]

@@muttfacemcderp980 pls help me 10×10..=100.. is not coming..?

[@sonnychauhan6707]

I am a still a little confused on how you know the boundary's between the digits

[@MaryAnnNytowl]

The set of crossings farthest to the right is the 1s, the next sets (follow each batch of lines to the left) will be the 10s, the next set(s) will be the 100s, the next set(s) of crossings will be the 1000s, and so on.

[@resonance2001]

Ooh, another method. Interesting...

[@fuzziieverlove3015]

The first one was so easy. The rest of them turned my gray hairs back to black.

[@roastjaeger9932]

It’s getting to the point where you could use normal multiplication:)

[@sheek1982]

Yay! Now, i'm a genius 🤣

[@kv0074]

What if zero comes in the end like 50*70

[@MaryAnnNytowl]

You just put a zero there. Like with the ones he crossed out, their answer is zero + what the other set equaled. Like for 607×24, the 2nd set of crossings was 14+0, and the 3rd set of crossings was 24+0. Your example would have crossings where they would be 0+0, so you'd write down 0.

[@jaivirjawla8994]

Sir aap ak bde no ki video nikalye like 987 *89🤔🤔

[@adinath1974]

Best👍

[@sushilakumaripadhy3625]

nice

[@jamesworley9888]

I keep doing this one in particular that I never seem to get the right answer to. It's a big fella a whopping 5,999,875 X 5,666,577 When I did what you did in this video I got an answer of 32,703,257,277,875 However whenever I tried doing this on the google calculator I got quit a different answer of 33,998,753,677,875 How did I get this wrong?

[@jamesworley9888]

I re-did it and got the right answer but desided to B- myself for only getting it second- handedly. (Edit) third handedly actually it took me 3 trys to get it right and sure enough the answer is 33,998,753,677,875 or to put it in words *THIRTY* *THREE* *TRILLION*, *NINE* *HUNDRED* *AND* *NINETY* *EIGHT* *BILLION*, *SEVEN* *HUNDRED* *AND* *THREE* *MILLION*, *SIX* *HUNDRED* *AND* *SEVENTY* *SEVEN* *THOUSAND* *EIGHT* *HUNDRED* *AND* *SEVENTY* *FIVE* !!!!!!!!!!!!!!!!!!!!!!

[@Rsafevideos]

so usefull

[@pmacdonald1948]

I like this math method

[@NoProductionsGD]

I would do it in my head like this: 109 x 72 100 x 72 = 7,200 9 x 72 = 648 7,200 + 648 = 7,848 109 x 72 = 7,848 Here are some other examples that lets expanded form help you out: 232 x 44 200 x 44 = 8,800 30 x 44 = 1,320 2 x 44 = 88 8,800 + 1,320 + 88 = 10,208 232 x 44 = 10,208 597 x 13 500 x 13 = 6,500 90 x 13 = 1,170 7 x 13 = 91 6,500 + 1,170 + 91 = 7,761 597 x 13 = 7,761 1,004 x 27 1,000 x 27 = 27,000 4 x 27 = 108 27,000 + 108 = 27,108 1,004 x 27 = 27,108

[@mariahstratton3091]

i having trouble figuring out which lines to circle but i guess that probably because i have no sound on

[@ndavis1512]

What will happen if the answer has a zero in it, what would that look like?

[@MaryAnnNytowl]

You just put a zero there. Like with the ones he crossed out, their answer is zero + what the other set equaled. For the problem he did that was 607×24, the 2nd set of crossings was 14+0, and the 3rd set of crossings was 24+0. Your example would have a crossing where they would be 0+0, so you'd write down 0 for that place.

[@alchamistoh1627]

this one is alittle more confusing what if you don;t use the "5's" ? will you still get the same answer?

[@MaryAnnNytowl]

Yeah, you'd get the same, but your sets of lines would be a lot larger. You'd need 6 lines for the 600, rather than a 5 and a 1, so 6 total lines rather than 2 total, for just that first crossing set. You'd need, for example, 9 total lines for a 9, rather than a 5 line and 4 1s lines.

[@alchamistoh1627]

@@MaryAnnNytowl thanks - 4 years later … 🤣

[@srenstraarupfrederiksen313]

What if it's 20 x 40

[@nqshershey2206]

Hey guys has he done this trick: It's called multiplying any 2 digit number by 99 Ex: 99 times lets say 47 First step is minus 1 from 47 which is 46 Second step now how many numbers do u need to add from 47 to make it equal 100, which should be 53 because 47 plus 53 equals 100 Third step is say the two numbers together as if u were saying it in the thousands. Like it should be 46 thousand and 53 U can check if u want and it's not that hard when u start to get used to it! Hope u guys like that trick and maybe he should use it If he hasn't already done so Now try 99 times 75 for practice

[@allenbaranov9357]

woah nice, didn't check but if it works, that's pretty cool

[@danielsanchez7824]

How do u 529 x 65??

[@Beos_Valrah]

imgur.com/FxZbL79