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[Flame[1up]]

A faster way of doing math that I was not taught in school.

This trick is one of the most common tricks taught in UIL Number Sense (If you're interested)
Just thought I would tell you just in case you wanted to look up some more advanced Number Sense tricks.

For example any number ending in 5 squared (such as x5) becomes (x*(x+1))25
15*15=(1*2)25, 225
25*25=(2*3)25, 625
55*55=(5*6)25, 3025

Another common useful trick is the eleven's trick, for example 25x11 is 2(2+5)5, or 275
You write the right-most digit then start going left adding the digits two at a time so
45234x11 is  4(4+5)(5+2)(2+3)(3+4)4 or 497574

Apologies for going overboard I am just an avid competitor of Number Sense

[Fusion[1upZ]]

[Fusion[1upZ]]

A faster way of doing math that I was not taught in school.

This trick is one of the most common tricks taught in UIL Number Sense (If you're interested)
Just thought I would tell you just in case you wanted to look up some more advanced Number Sense tricks.

Wrong 45x34 and all those inbetween numbers

[Flame[1up]]

A faster way of doing math that I was not taught in school.

This trick is one of the most common tricks taught in UIL Number Sense (If you're interested)
Just thought I would tell you just in case you wanted to look up some more advanced Number Sense tricks.

Wrong 45x34 and all those inbetween numbers

Assuming You're talking about the near 100's trick, no it works by definition.
(100-x)(100-y), FOIL it out
10000-100x-100y-xy
10000-100(x+y)-xy (Association) This is what the trick does

So even though it is not efficient for 45x34 it still works
You get reference numbers of 55 and 66, their sum is 121
100-121=-21 (and we add two 0s since it is to go in the hundreds place), so -2100
55*66=3630
-2100+3630=1530 which is 45x34.

This trick is only beneficial when used in numbers 10+/- of 100, or else you start jumping into more 2 digit mult. Though it should work on any multiplication.

[Cope57[1up]]

I am ruined...

I just noticed a flaw here.... It can not be "Luck Be In The Air Tonight", because the "I" has already been used.
I am now doubting that it could be that, and could be possibly the other choice I was thinking.  I will say my mind is still ruined... hehe

[suge[1upZ]]

i don't even know



Edit:  Fixed your link for you.

[Cope57[1up]]

[Cope57[1up]]

[Cope57[1up]]

Ronda Rousey

11 fights
7 title fights
2 world titles
_______________
25 minutes and 2 seconds total time spent in the cage.

[Cope57[1up]]

Here we are, back to the future.

[Cope57[1up]]

Just.... wow

[Cope57[1up]]

If one has not googled for "50 most popular women" here is the link.
First result, click the link.
Look at number sever.

Oh, and for awesome picture of the day.

[suge[1upZ]]

Matt

[Cope57[1up]]

[Lancer]

If this doesn't make you smile, I don't know what will...