what is the method to calculate quickly in your head instead of using a calculator every time?

Answer 1

here's a great trick to help you calculate things quickly in your head. All you need to do is, on a daily basis, mix eggnog with a spoonful of jelly and heat in a microwave for 30 seconds, a half glass will probably do well. also, melting cheese over slices of watermelon is a great snack to help with the math skills.

you see, doing math quickly relies on lactoidal synergism. When present, it will create enzymes that help trigger areas of the brain used for number altercations... in other words, math problems. eggnog has a number of lactoidal enzymes, but they are usually bonded with a hydrogenous peptide. However, mixing eggnog and jelly and then heating the substance will break the bonds and leave the enzymes free. The enzymes mix with the jelly to provide the synergism. Therefore, when you drink it, you flood your system with lactoidal synergism that can help with the math problems. Same with melting cheese onto watermelon.

It'll probly take 2 - 3 weeks for the enzymes to reach a level where you can notice improvement in math skills. However, in 8 - 10 weeks, your skills will most likely improve by 2 grade levels!

Answer 2

Break it down into smaller amounts

Say you want to multiply 18 x 18

First, you can approximate 20 x 20 = 400, so as a self check if your answer comes out greater the 400 you know you did something wrong, 15 x 15 "you" may know is 225 so your answer has to be greater then that

So how to multiply in your head?

Break it down into smaller equations

18 x 10 = 180 is an easy start

that leaves 8 x 18 to figure out (hint 18 x18 = (18 x10) + (18 x 8)

8 x 18 = 8 x10 + 8 x 8 = 80 + 64

180+80+64 = 324

Another approach

18 x 20 = 360 easy math to do in you head

18 x 2 = 36

360 - 36 = 324

Answer 3

Round the numbers to the closest that you know and then subtract (or add) the part you rounded.

58 x3 becomes 60 x 3 which is 6 x 3 =18 with the zero stuck back on = 180

now 60 is 2 more than 58 so 2 x 3 =6

180 -6 =174

Answer 4

Good question. If "Truthbetold" is correct then Gauss must have been a big milk drinker. Having read about this mathematician who at age 10 mystified his teachers with his math prowess, I am led to believe that the people who are best at calculating quickly in their head are those who are gifted in this manner. For example there is an absolutely clever way of adding all the numbers from 1 to N simply by doing it with two simple steps in your head. These are nothing but tricks you say! Indeed they are, but this is the essense of mathematical genius - the one who can discover the tricks.

Answer 5

I do little tricks in my head because I am horrible at math...

It's like the rest of my brain outgrew the math part and stunted it to accommodate the others...

I still count on my fingers for pete's sake!

Answer 6

You ARE alowed to use a calculator in highschool unless you are one of those idiots who is trying to act good at maths.

Answer 7

practice practice practice

My calculator's my best friend, but a buddy of mine can run numbers off the top of his head like no other, it's amazing.

He wasn't born brilliant with numbers either, he just worked at it and now it pays off big time for him, it's such a time saver.

Keep trying!

Answer 8

round every thing to 10s then - the pennys