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nannerz · 2009-08-05, 04:08 PM

I did it automatically as 7x50 - 7x3

And I can't seem to actually access what is in your spoiler, lol.

Corn · 2009-08-05, 04:16 PM

MasPan Wrote:I did the math in my head. Didn't picture any paper or pencil, just floating numbers. I also vocalize in my head what I'm thinking to help me keep track of what I'm doing.

This.

Cactuar · 2009-08-05, 05:10 PM

7 x 7 = 49
7 x 4 = 28 x 10 = 280

Added them. Technically I did the first one, but I misread it.

DarkPwnage · 2009-08-05, 05:14 PM

I multiplied it like it was on paper in the air. I've been trying to train myself to be able to do double digit by double digit multiplication like that recently xP

MasPan · 2009-08-05, 05:18 PM

DarkPwnage Wrote:I multiplied it like it was on paper in the air. I've been trying to train myself to be able to do double digit by double digit multiplication like that recently xP

The way I learned to do mental math was simply doing it on every single math question I ever got. Teachers would get annoyed frequently at me not "showing my work." I refused to spend half a minute writing down what I did when it only took 5-10seconds mentally. Writing slows me down, because my hands can't keep up with my brain.

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Poll: How did you get the answer? You do not have permission to vote in this poll.
Take 7 times 4, multiply by 10, add 7 times 7.	24.53%	13	24.53%
Take 7 times 5, multiply by 10, subtract 7 times 3.	20.75%	11	20.75%
Take 7 times 5 and say it's "about 350".	5.66%	3	5.66%
Double 47 three times, subtract 47.	0%	0	0%
Imagine a piece of paper and do cross-multiplication with your imaginary pencil.	15.09%	8	15.09%
The above, with physical paper and pencil. (wow)	0%	0	0%
Use Google Calculator. Extra points if you typed it into Toolbar and used autocomplete suggestions.	1.89%	1	1.89%
Use a physical calculator.	1.89%	1	1.89%
Hover over the spoiler. (Shame on you.)	15.09%	8	15.09%
Other (specify)	15.09%	8	15.09%
Total		53 vote(s)	100%