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Cool math tricks! (pg. 5)
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| Psy-T |
| quote: | Originally posted by Sunsnail
Here are some neat math short-cuts that you can do in your head
142
213
+431
When you see a math problem like this, you were probably taught to add the right-most column first. Then the middle, then the left-most. But, doing it from left to right is actually much faster!
Start with the left column. 1+2+4 is 7. Keep 700 in your mind. Then add the middle column. 740 -> 750 -> 780. Then the last column. 782 -> 785 -> 786
See how much faster and quicker that was? :p
Here's another one:
346
473
+170
So, first add the left column. 8(00). Then the middle column. 180. Uh-oh, its more than 100. So add 100 to 800, and you're left with just 80. Now the last column: 989 is the final answer!
Here's one with multiplication:
24
x12
Now, do the right column. 2x4=8. Now, cross multiply 4x1, and 2x2, and add the sum together. which is 8. Now multiply The left column, 2x1. Which is 2. The answer is 288. Pretty cool huh? :wtf:
Here are some more problems to practice with. Check them with a calculator to see if you're right.
63
x52
532
125
+842
32
x64 |
none of your methods made my calculations faster
took me 3-4 seconds each. either way |
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| Psy-T |
oh, and about math in general, i never studied it at school, i just showed up for the tests and learned most of what i was supposed to do from the tests themselves. (i got 100% on all the math tests that didnt include trig, except for a few times, when the teacher was a bitch and reduced my score for not showing how i got to my solution.... i always just wrote the answer, calculated all inside my head)
never managed trig though, the teacher always said im only one step away, but i couldnt be bothered to find out that extra step |
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| mzvirbulis |
| quote: | Originally posted by mellow_head
what the hell?:D
E=mc˛?:p |
ENERGY = MASS X SPEED OF LIGHT SQUARED |
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| THE_Chris |
Just for the record, heres a REAL maths test. My Maths Methods II exam paper. I did this last summer.
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| Project 7 |
| I never new, tranceaddicts where so brainy |
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| Slylee |
| "cool" and "math" do not belong in the same sentence. |
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| UWM |
| The breeze was making me cool, so I set my math book on fire. |
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| wizniz |
| quote: | Originally posted by UWM
The breeze was making me cool, so I set my math book on fire. |
+1
:whip: |
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| Sunsnail |
| quote: | Originally posted by Psy-T
none of your methods made my calculations faster
took me 3-4 seconds each. either way |
well, for most people it was faster :conf: |
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| OurManFlint |
| quote: | Originally posted by Slylee
"cool" and "math" do not belong in the same sentence. |
"Math is cool.":D
Sounds like some people don't like math because they have problems with it. If anybody has a problem, just post it. Whenever I used to get stuck on a problem, I used to think of the problem as a puzzel rather than a math equation. Took out any kind of math anxiety I had. Works well in Calculus. |
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| ARNATINE |
| quote: | Originally posted by Basstard
i bet sunsnail is last on TA to bang jennypie |
:haha: |
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| Dmatrox |
good to know basic math so you know how to figure out discounts when shopping, or figuring out how long it will take you to get to another city by driving a certain speed.
alot of math is pretty useless and i still can't beleive they make you do stupid math/calc courses in high school.
on a side note, math skills are also an indicator of iq. |
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