Calculator fucked me up.

[Anonymous No.11358163]

Bros, How can i recover from this?
Basically in all of "Highschool"(equivalent) they allowed me to use Pic related, even on Tests.

In 4 months i gotta take the hardest admission exam in my country with no calculators at all.
70 advanced Math questions, 20 "IQ" questions, 40 (physics, chem, bio) questions in 3.5 hours.
the last 60 are no biggie, but now i'm not able to do simple operations under 20 seconds (/ * + -)

How can i prepare for this? did i fucked up too bad?

[Anonymous No.11358166]

>>11358163
>How can i prepare for this?
Practice without a calculator.

[Anonymous No.11358174]

>>11358163
lol When I was in school all calculators were confiscated if any teacher ever found one, no matter where it was. They were banned.

[Anonymous No.11358177]

>>11358163
choose one of the online courses available (like khan academy) and just run through all of the simple mathematics that you need help on. do the courses and tests and everything several times over.
i think you will find that you do know this stuff you just need to catch up on it. good luck

[Anonymous No.11358201]

>>11358166
is the brain like a muscle? i've been doing all of them over and over again since december. but unlike my lifts i haven't been able to do them in faster time.
>>11358174
"lucky" you?
>>11358177
been doing that, but ego is making it hard for me to focus.

[Anonymous No.11358241]

>>11358201
if you want to learn something faster as an adult you should do aerobic exercise 7 days a week, play an instrument and occasionally use psychedelics/pot.

[Anonymous No.11358596]

>>11358163
khanacademy

[Anonymous No.11358610]

>>11358163
>i

[Anonymous No.11358655]

>>11358163
Do you have any test from a previous year to practice on, curious to see if there are some shortcuts that can be used in those calculations.

[Anonymous No.11359327]

>>11358610
>capital letters
cringe af

[Anonymous No.11359329]

>>11358163
lol? that's over 90 seconds per question, what are you worried about?

[Anonymous No.11359362]

>>11359329
that i became basically brain dead for simple mental math.
>>11358655
here are some of pics.

[Anonymous No.11359372]

>>11358655
here is the "guide", is just the test of the year before.
https://[]drive.google.com/[]open?id=15oM-1RBYUYkAXPmGo-YnxfDXcEA26aI7.

You have to download it tho, Drive is too shitty and cant show the preview.

[Anonymous No.11359409]

>>11358610
I

[Anonymous No.11359418]

>>11359362
what do you have problems with specifically?

[Anonymous No.11359451]

>>11358163
>addition
For 2/3 digits Learn to mentally resolve numbers into 10s. You want to make one of the numbers "clean" by adding the final digit of it to the other number until all of the digits become 0. (83+28=80+31=111
267+596=260+603=200+663=863)
Another method is to "borrow" from the other number to make a number clean
(83+28=30+81=111
267+596=600+263=863)
>subtraction
Instead of viewing it as x-y=z, try viewing it as y+z=x
That is to say, try to count up from the number with the smaller absolute value to the bigger one mentally. Add numbers so each digit matches
(537-343: 343+4=347,347+90=437, 437+100=537, the difference is the sum of all the numbers you added 4+90+100=194)
If you reversed the numbers, you'd use the same exact process but just remember to add a negative sign to the result
>Multiplication
You want to resolve one of the number into clean numbers
34*21=(21)(30+4)=21*3*10+21*4
The way you resolve the numbers depends on the specific problem though
>division
view it as a fraction, remove any common factors , in some cases it's useful to do it this way
34/5=1/5(30+4)=6+4/5=6.8
Remember, these are all just mental tricks

[Anonymous No.11359475]

>>11359418
Calculate FAST(5 sec Max)
At least 6 digits addition/subtraction,
At least 3 digits digits multiplication/division
At least 2 digits square roots/exponents
Factorize
Linear Equations

i want to have a basic calculator in my head basically; i was able to do the first three at the end of middle school, but now i struggle with
all of them because i got used to only typing it on the Calculator.
I been speedrunning this shit with the 10 times table over and over and over again.
https://www.mathsisfun.com/numbers/math-trainer-multiply.html

[Anonymous No.11359657]

>>11359475
lol im not sure if youre the OP, but in the case that you are, I was in the exact same situation a couple years ago. Theres nothing to sweat. First thing I would advise is you get rid of your calculator. Chuck it somewhere and never use it again (despite how comfy it is and how it does fractions do smoothly- forget it all). Its rare youll come across harsh computation but when you do, just use your computer and some easy language (julia works out of the box). Going forward (im assuming you are in high school), what is important is not how quickly you can computer 6969*1488, its your ability to deal with abstract ideas and think fast on your feet (in the sense of creativity not robotic computation). Start reading some good books and if you havent yet start calculus, its very easy and I suggest you start on sequences,series then limits, then derivatives (I was taught it differently but this is better).
>linear equations
i assume this means youve taken lin alg but it doesnt matter how quickly you can complete a gaussian elimination on a matrix, what matters is that you can handle each and every case (diagonal, surjective injective operator, etc.) and once youve got that down, computers can handle algorithms (thats what they are there for)
>https://www.mathsisfun.com/numbers/math-trainer-multiply.html
dude, dont go on these retarded sites. Like I said, books are your friend and math stackexchange is also pretty good. good luck

[Anonymous No.11359735]

>>11359657
yeah, i'm OP, i went to that retarded site because i wanted to improve my "raw" calculus speed, like my man Arthur Benjamin. but i read books too, i already sold my Calculator.

[Anonymous No.11359930]

>>11358163
Are you doing the NSAA?
4 months is a lot of time man, just put down the calculator and do more questions in your head and it'll also help for the interview since you'll start thinking in your head.

Ps. It's not the hardest test in the country

[Anonymous No.11360087]

>>11358163
Get at least the single digit multiplication table under your belt.
Also for addition. I learned that by doing, but you are hard pressed for time.
Multiply and divide large numbers manually to practice.

[Anonymous No.11360220]

>>11359930
For Cambridge?

[Anonymous No.11360339]

>>11360220
Yeah

[Anonymous No.11360694]

>>11358163
>>11359362
nigger this is just algebraic, you need no arithmetic operations..... mexichit or peruvian i am guessing

[Anonymous No.11360697]

>>11359475
>Calculate FAST(5 sec Max)
>At least 6 digits addition/subtraction,
>At least 3 digits digits multiplication/division
>At least 2 digits square roots/exponents
just use the properties of operations you learned in elementary.

[Anonymous No.11361340]

>>11359362
>>11359475
You don't need anything like that if the test is like in the picture. Just learn to do the actual math.

[Anonymous No.11361416]

>>11359372
>here is the "guide"
Thank you. This will be fun, especially since it is in Spanish.