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Creative ways to stay sharp on you algrebra and pre calculus skills when you're not in class?

Hey, guys! Any other math enthusiast out there? I just took pre-calc with Trig last spring. My intention was to take Calc 1 this fall while pre-calc was still fresh on my mind. Unfortunately, things aren't going to work out that way. Does anyone have a really creative and fun way to stay sharp on their maths? I already have a few of my own but I want to know what other ideas people have. Thanks:)
PS: My current method is solving TED riddles using systems of equations.

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rickharris17 days ago

https://betterexplained.com/

try this site - I only saw it yesterday

+1 Neat site Rick..

An intuitive approach to math was the use of a (Versalog) Slide rule in my high school and early engineering years.. Then the first led $400 HP calculator came out..

RampedUpDIY (author)  iceng16 days ago

I have two different kinds of slide rules that my grandparents gave me when I was younger. I had meant to learn to use them and even got a manual for them but never managed to find the time. Now I have a job and am in college and time is a myth of the past...

I was gifted a cylindrical slide rule by my brother when I was at school. Worked fine but cause so much interest from other pupils I was asked not to bring it into class :-(

Effectively the scale was about a meter long but wrapped round a cylinder.

Wish I knew what happened to it.

OtisKing.jpg
RampedUpDIY (author)  rickharris11 days ago

That thing is pretty cool

RampedUpDIY (author)  rickharris16 days ago

Thanks!

seandogue12 days ago

Go to the library and look for older textbooks. Do the problems.

Create flash cards and get a feiend or family member to assist you in using them to review and refresh your identification of the various forms you'll see in the future.

...and get a ***friend*** or family member...

Learn to not rely on tables of standard results and identiites. Learn them by rote, until when you need them, they appear to you. Learn the sine (a+b), sine (a-b) etc

Of all the maths I learned at school about the only thing I have used, beyond regular arithmetic, is algebra and that, largely, because I became an electronics engineer.

Mind, on a daily basis Ohms law is about the only electrical formula I used.

My career has been "mixed media" - physics, maths, Electronic, mechanical and software design, so I've needed a good tool kit in my head.

It's certainly better in the head than having to look it up. Sadly today's students often don't appear t know what to look up.

Vyger17 days ago

Go to the store with your mom or girlfriend and see how close you can get to the total that the checkout gets without using anything but your head and your fingers. You are allowed to keep a running total but you also have to figure the sale prices of things and any coupons they might use plus things like buy one get one at half price specials. Not many people these days can do something like that without using a calculator. Remember, no smart phones, just your head.

RampedUpDIY (author)  Vyger16 days ago

That's a really cool idea for head math and being quick without a calculator. Definately useful but I need to practice developing equations and creating my own properties/identities.

As a habit I always round all prices to the closest 50 p (1/2 a £1)

Then total. I am not often far off the total for our weekly shop.

My wife can't understand how I do it. (or why).

Oddly she can add quickly but not take away. this is because her mother ran a shop with no fancy modern till so prices had to be totalled in your head. Even giving change was done by starting ith the sale price and adding cash until the tendered amount was reached. - All adding up.