General Question

seVen's avatar

Is there a special method to calculate fast in your head?

Asked by seVen (3472points) May 30th, 2008 from iPhone
Observing members: 0 Composing members: 0

7 Answers

wizard's avatar

I pretend like I’m writing the formula down on a piece of paper in my head.

lefteh's avatar

I use these tricks a lot. It helps a lot in math class and in real-world applications.

jstringham21's avatar

I say it to myself as I picture the problem in my head.

NeroCorvo's avatar

learning to use an abacus will allow you to visualize math calculations easily.

Lightlyseared's avatar

You need the Trachtenberg Speed System. It allows you to do multiplication and division on any number no matter how big with out having to count to more than 11.

mvgolden's avatar

I usually look for what the calculation is close to. For example. If I have to take 31% of 98 I say that is close to 1/3 of 100 or 33.3. That usually gets me close enough.

Lightlyseared's avatar

Sorry I should have put this in my first post Trachtenberg Speed System.
This method won’t get you close it will get you spot on.

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