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When You Do Math. . .

Do You Count On Your Fingers, Or In Your Head?

  • Total voters
    47
I'm really good at maths. I usually count penises to help me fall asleep. It's a good exercise.
 
Use my finger, or a calculator.

I suck at math badly. Failed it every year at school....
 
A quote I remember from a newspaper article about high school students overuse of calculators...
Math teacher: "They can't count to 11 unless they unzip their fly." lol :D
 
Everything happens in my head. I can count to 299 on my hands but I really don't need to.
 
I rarely do arithmetic. Heavy hardcore math doesn't have numbers so I can't count them on my fingers even if I wanted to.

What I do though, for arithmetic stuff, is break stuff into 'chunks', and add those together.

Suppose you have 48 + 86.

In my head, I go (40+80)+(8+6) = 120 + 14 = 134.

I know it seems like it takes longer, but in my head it's actually a faster process than carrying anything. Bigger numbers work the same way.

149 + 132 + 264 = (100+100+200) + (40+30+60) + (9+2+4) = 400 + 130 + 15 = 545.
 
I usually do math in my head. When I have to demonstrate counting, I sometimes use my fingers. (Last night, for example, when someone said "say that ten times fast" and I did, I counted the ten times on my fingers so she knew I was actually doing it.)

I also use a mala to count to exactly 108, but that's not exactly math either.
 
I've always been above average with math. No surprise that I turned out to be an accountant.
 
I wqill do most division and multiplication on a calculator faster than manually, but I NEVER use a calculator to add or subtract - even massive queues of 30 or 50 numbers - and I pretty much get them right all the time. And FASTER than via the calculator...where I'm actually more likely to make mistakes anyway (by hitting wrong keys).

But no, I don't count on my fingers...which was the original question.
 
MindBlast said:
I rarely do arithmetic. Heavy hardcore math doesn't have numbers so I can't count them on my fingers even if I wanted to.

What I do though, for arithmetic stuff, is break stuff into 'chunks', and add those together.

Suppose you have 48 + 86.

In my head, I go (40+80)+(8+6) = 120 + 14 = 134.

I know it seems like it takes longer, but in my head it's actually a faster process than carrying anything. Bigger numbers work the same way.

149 + 132 + 264 = (100+100+200) + (40+30+60) + (9+2+4) = 400 + 130 + 15 = 545.
Click to expand...

And if I'm double-checking my addition, I do EXACTLY what you described!! Though it's not an entirely accurate term, I call it "adding inside-out."
 
frankfrank said:
And if I'm double-checking my addition, I do EXACTLY what you described!! Though it's not an entirely accurate term, I call it "adding inside-out."
Click to expand...
I can usually do that in my head, as long as I'm not adding more than three numbers.

When adding more than three numbers, I usually do it on paper, and I add them in pairs. For example:

34 + 23 + 98 + 87 + 90 + 56
.....^..........^..............^
.....57....+....185.....+....146
.............^
...........242.............+....146 = 388

And then I divide by six and discover that the student has just barely pulled off a D in my class...
 
I don't do math. That's why god invented Excel.

Honestly though. I don't churn my own butter either.
 
I'm awful at math. My fingers usually do the trick if a calculator isn't around.
 
Swellegant said:
I've never in my life counted anything on my fingers. I never saw the point in that. So I do everything in my head until I get confused, then I write it out. Or I get my calculator out... I have one in my phone for figuring tips.
Click to expand...

I do tips in my head. Take the total after tax, move the decimal one place to the left, double it, round, and that's the tip. This is 20%, which is a proper tip these days. If you want to tip 15%, move the decimal, remember that number, divide by two and add the number you remembered, round, and that's the tip.
 
Calculator. Anything under 10 and I use my head.

I'm fine with simple math but I'm embarrassingly anything beyond that. I hated it ever since middle school and always wondered "why do we have to learn this?" In college I felt bad for the TA's when the class didn't get it because it's frustrating to try to convey mathematical concepts to people who are visual learners (like me).

I'm not going to give a Dr. Ken Robinson lecture on why we should teach more creative courses in school but art is sadly unappreciated by many high school's.
 
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