80%(30 + 40 divided by 4 times 5) =? Percent and BASIC Math Practice - NO Calculator

[@Ayelmar]

Solved in my head at the thumbnail, the answer is 64. 80% ( 30 + 40 / 4 * 5 ) Following PEMDAS, we first divide: 80% ( 30 + 10 * 5 ) Then we multiply: 80% (30 + 50 ) Then we add, finishing up the parentheses: 80% (80_ Since 80% is 8/10, 1/10 of 80 is 8, multiplied by 8, so the answer is 64.

[@nancyholcombe8030]

64. Using PEMDAS for what's in the parenthesis, 40/4=10, 10x5=50, 50+30=80, which takes care of what's in the parenthesis. 80% as a decimal is .8 (move the sign 2 places the left and turn the % sign into a decimal point). .8(80)= .64, move the decimal point back right two places and use the percent sign again, so .64 is now 64%.

[@mikehigbee2320]

Yay! I did it. Other videos I have seen by you helped me get it straight. Thanks!

[@bazkeen]

64. 0.8 x 80

[@brianburgess3231]

That's how I went about it in my head also .. basically just remove the Zeros.. 8*8

[@American_Made]

I do it differently, I divide 80 by 5, then multiply that answer by 4.

[@brianburgess3231]

@@American_Made there ya go 🫡

[@jillcolvin4196]

6.4

[@petesmith9472]

Thank you thank you thank you…. PEMDAS L2R…more learned from this channel than 12years of early schooling. And I reckon it took me about five seconds.

[@somersetcace1]

That IS the counter intuitive aspect of PEMDAS. Parenthesis and exponents have no groups, but multiplication/division and addition./subtraction are groups within PEMDAS, and should be done left to right so long as they are in the same group. It's easy enough to remember once explained, but yes, it does seem to cause a lot of confusion. I used to look at it as P-E-MD-AS, just so I wouldn't forget.

[@trevorhilyer]

I got the answer a different way. 10% of 80=8 in the parentheses. Then dropping the trailing zero on each side, for 10 % of anything, you drop the last digit of both sides and the because of the parentheses, you multiply the figures. Then 8x8-64

[@joannebabbs384]

Thank you for PEMDAS. I did not remember this from school.😢

[@chriswhite6218]

PEDMAS 40/4=10x5=50+30=80. 80x80=8x8=64 or 80x80=6400/100=64. The multipication after addition is required to figure the percentage and not part of the PEMDAS rule.

[@dateland-twopalmspress755]

did it in my head in about 10 seconds -- to do the 80% of 80, I subtracted 8, got 72, then subtracted 8 again to arrive at 64

[@johnshaw6702]

Interesting. 80% of 10 is 8. 8 x 8 is 64. I use different methods depending on which is easiest for me.

[@dirtydawg448]

@@johnshaw67028 x 8 = 64!

[@larrnew]

I got it right thanks to your lessons!

[@trishw229]

I love this type of problem!

[@MaryColbert-v5q]

40/4=10X5=50+30=80 My 8th grade math teacher taught me Base X Rate =Percentage 80%=0.8(need to move the decimal point 2 places to the left to convert the number with the percent sign after it.) 80 X 0.8= 64

[@jimnbigd7607]

Reducing a fraction such as 8/10 to the lowest integer numerator/denominator (4/5) is not always simpler. "80 divided by 10, then times 8" is easier to do in the head than "80 divided by 5, then times 4" -- 8x8 vs determining 80/5 (16) then times 4. In fact, to solve this in my head, I thought: 80 percent of 80 means 80x80 divided by 100 = 6400/100 = 64.

[@jackack1429]

Thank you! I love your channel.

[@pauldobson2529]

We called it BODMAS in Australia...Brackets Of Divide Multiply Add Subtract Exponents came much later in school

[@mauriziograndi1750]

80 is the brackets result and is our 100%. 80/100=0.8=1%(moving the comma two digit to the left) 0.8x80= 64 No calculator and in less than a minute.

[@franhagaman6806]

yea after watching you a number of times I am remembering how to do PENDAS some70 years after I went to HS

[@panlomito]

80% = 80/100 = 8/10 = 4/5 30 + 40 / 4 x 5 = 30 + (40/4) x 5 = 30 + 10 x 5 = 30 + 50 = 80 So 80% of 80 = 4/5 x 80/1 = 4/1 x 80/5 = 4 x 16 = 2 x 32 = 1 x 64 = 64

[@SisterFromAnotherPlanet]

I got it right in my head, not using pen and paper! But at the last step I just multiplied .8 x 80 = 64. Do you have to do the fraction step?

[@johnshaw6702]

I'm not even going to watch it this time. 80% of 10 is 8. 8 x 8 is 64.

[@lj6079]

I still do the fraction, it's what I learnt at school😂 this was an easy one for me so no pen and paper just the grey matter

[@renaeschuchard9824]

80%(30±40÷4×5)= 80%[30+(40÷4×5)]≈ 80%[30+(50)] 0.80(80)=64 Long handed work.

[@rogersiples3335]

Figured in my head in one second.

[@NMalteC]

I'm thinking 64. Because 40/4=10. 10x5=50. 30+50=80. 80% of 80 =64 (1% of 80 = .8. 80x.8=64

[@raya.pawley3563]

Thank you

[@lohkarchuen8800]

64

[@sussanalam3810]

Easy calculated in brain. Answer 8x8 = 64

[@siminhayatifallah4075]

Did it Right thanks

[@cynthiacatnott9012]

I learnt to do percentages this way 80/100x80 =64

[@3rdjrh]

That’s how I figure out price differences for sales at the mall

[@Vipre-]

1:54 That doesn't even mention the people who'll insist it should be 70 divided by 20.

[@ManojKumar-e3h5c]

Bodmas formula 80%( 30+40÷4×5). = 80% ( 30+10×5) = 80% of 80 = 80/100×80 = 6400 ÷100 = 64 answer

[@manuelquitevis6794]

80% ( 30 + 40 :4 x 5)= 80% ( 30 + 50) = 80(80) :100 = 64

[@debasismajumdar8634]

Apply basic BODMAS sequence, solve it orally in less than 5 seconds 😊

[@tomtke7351]

if YOU write equations like this please use clarifying."()" I.E. 80%(30+((40÷4)×5))

[@themaestro5745]

Thank you! It’s ludicrous to write equations without the clarifying parentheses. It makes it bullet proof when you do the parentheses

[@MrSummitville]

​@@themaestro5745 Duh!

[@Teronix100]

Honestly if you are used to PEJMDAS. You would write it 80%(30+40*5÷4). Confusion gone...

[@robortoalmeida5331]

Deu 64.

[@jiyoungpark6233]

64..., 80x 8/10=640/10=64...

[@wackowizard1045]

25.6

[@MrSummitville]

?

[@CarolynRice-b6o]

28%

[@pragaviswa8647]

2.56 is the answer by mental caculation

[@FootballFanLeanne]

80% (80) 80% from 100% = 20% 10% of 80 is 8 20% of 80 is 16 80-16 =64 Different method same answer,

[@kavitapingle]

I don’t understand as per PEMDAS multiplication comes before division but you solve division first Why ?

[@rosenoonan6689]

Multiplication and Division are equal under PEMDAS - it’s whichever one comes first.

[@bazkeen]

@@kavitapingle Multiplication and Division are a group and so is Addition and Subtraction. In the group, it is what ever comes first from left to right 👍🏻

[@julieproca]

40 divided by 4=10x5=50 +30=80 80 o/o of 80= 64.

[@michellen2325]

easy 64.... I did it in 10 seconds... I did not write down anything down; my version was 80 x 80 divided by 100

[@jonathanleech3327]

Why use PEMDAS if division can be used before multiplication

[@epicelias]

Because a lot of people like having a routine when solving problems so they don't mess up

[@paulfrank8738]

The rules that PEMDAS represents says; parentheses first, exponents second, multiplication *and* division next, addition *and* subtraction last. For each of those categories, perform operations from left to right.

[@johnshaw6702]

Never liked that about math acronyms. I actually never used them when I was young. I have taken a math class in over 40 years and still remember the rules.

[@michellen2325]

whichever comes first from left to right.

[@romanwondimu8696]

26

[@russelllomando8460]

got 64 easy pemdas 10 x 5 + 30 = 80 x .8 = 64 thanbks for the fun

[@brianburgess3231]

got 64 here

[@chrisdissanayake6979]

80% of 80 = 64 Answer: 64

[@adgf1x]

4×80/5=64

[@patriciagreen2365]

.80(80) = 64

[@eNotesCenter]

answer is 64

[@edwardalikor9212]

40

[@darcagis5744]

Without a calculator, I came up with 64.

[@callielynn6179]

This just reminded me that I forget😂😂

[@austenrobinson2747]

Easier way 80% of 10 is 8 X 8 =64

[@okechukwuarinze8262]

Just 64

[@debbieholoquist2059]

did it in about 2 seconds.

[@v10cylinder]

but your result was wrong

[@oriaphyn]

64. Took me 5 seconds to

[@waltbroedner4754]

Same old BS problems. Teach some REAL useful math, algebra, calculus, trigh instead.

[@osgubben]

Why not use parentheses to avoid this? Silly😂

[@gopherspace8571]

👍👏🙏💪😎🌎

[@nancycat2588]

People will subscribe if the content is good. Too much time promoting and ads.

[@MrSummitville]

684,000 Subscribers !

[@donaldlemoine643]

Your wrong

[@Stylux-z1p]

10/272024 8:30 PM 1% = 1/100 = 0.01 , 100% = 100/100 = 1, 80% = 80/100 = 8/10 = 0.8 ------------------------------------------------------------------------------------------------------------ 0.8{ 30 + [ (40 : 4) x 5] } --> Target the deepest embedded expression first, prioritizing using brackets in accordance with PEMDAS Rules. 0.8{ 30 + [ (10) x 5] } 0.8{ 30 + [ 10 x 5] } 0.8{ 30 + [50] } 0.8{ 30 + 50 } ---> The distributive property can be applied here: 0.8[30] + 0.8[50] = 24 + 40 = 64 --> Alternative ANS 0.8{80} = 64 -->ANS

[@mossesmadjemite2289]

64%

[@icespeckledhens]

64

[@metaretinoandrandcunningham]

64

[@jamesirwin2816]

64

[@VincentSimmons-j4w]

64

[@roundtwo3321]

64

[@rgrinnell]

64

[@billmorris2613]

64

[@lindagillian8157]

64

[@TessSvillanera]

64

[@sheilajogoo5732]

64

[@alessioandreoli2145]

64

[@ralphmitchell7648]

64

[@lohkarchuen8800]

64

[@allanelliott5349]

64

[@sekharb6651]

64

[@kamalkishoredayya322]

64

[@josephlaura7387]

64

[@rajeshvyas934]

64

[@TrevSinc-w9c]

64

[@ResourcefulNomad]

64

[@trevaperes5343]

64