How to turn your brain into a calculator?

Learn patterns by experience.

1. Calculator solved in 1 ns. They have a few megahertz and about 11 MB memory.

2. Supercomputer such as "Roadrunner" can solved 1000 Trillion Calculations per second... Really amazing but it needs about 80 terabytes (80 Trillion bytes, well byte is equal to 8 bits, bit represent signal of switch off-on, bit is any 0-1 and a byte represents any character.) Using the optic fiber line put the message across. One computation of that computer is equal to one femtosecond (1 x 10 ^-15 second) much faster than light in travelling one feet in one nanosecond. This is used to solved nuclear physics, if human brain is used it will about 2 hours, so machine make it easier.

Trivia: About 6 Billion of humans across the globe will use calculator in 24/7, the calculation will be achieved at 46 years, but using "Roadrunner" it will be achieved just in one day.

3. Human brain can solved your question around the fastest 1 microsecond though not like light can run around 1 feet in one nanosecond. Ideal mathematician can solved 500 questions simultaneously but occur one error only.

a) We can just memorized around 1 KB (1000 character or 300 words) in 15 minutes.

b) We just solved around 20 cycles per second... More 100 Hz are for genius.

Human brain has limitation because gene can only predict that. Practice makes more light in arithmetic areas on the part of the brain.

a) It needs memory... Human brain is RAM, Paper is External memory...

b) It needs more processor... Human brain such as Leonhard Euler has... Good in solving, because all his life he solved everyday. Even old he can solved, but died of cerebral hemorrhage just like Einstein.

You want to be a supercomputer just be a robot. Robot is a matter that is manipulated by physics and mathematics at will. Every magnanimous dream of human can be put in robots.

Human brain creates robot brain, still human is the winner.

583+895 or 695*692

I'm sure you will get numerous responses on this. One issue is the way math is taught. When you look at problems like this, at least in a test situation, you can estimate what the answer will be. So for the 583 and 895, you can say 600 + 900 is 1500. We added 17 to the one, and 5 to the other. That's 22. 1500 -22 = 1478.

Lots and lots and lots of practice. I believe that at some point, the brain makes a crucial connection which speeds up mathematic capabilities by many times. Unless you have a greater purpose for attempting to do so, I would not even bother trying as it is a very rare percentage of the population that has mastered such a skill.

Haven't ever thought about it in that way to be honest

Thank you! valuable information and gives me better knowledge on this subject