Can you do sums in your head or do you need the calculator?

I can do the very, very basic ones in my head, only if they are ones that I can remember. The ones that are more complicated need a calculator or my fingers, which is really funny because I am very proficient in math. It was always one of my best subjects. I also have OCD, so a lot of times I have to recheck myself with finger or calculator, or paper, even though I should know the answer. 9x6 and 8x7 ALWAYS get me. LOL!!

If basic sums I do not need calculator. If complex and need percentage etc definitely I need my calculator. I always bring my calculator to stores if not I will spend more than I have budget!:P

I use the calculator for large amounts or complicated calculations. No use wasting time when you can have the amount in seconds. But for minor additions or subtractions I do it in my head.

I can do some, but I normally will use the calculater to check my answers especially if being exact is required.

Rachel

I'm good in math and I can do sums in my head. things like 365 + 418 is not a problem at all for me. of couse I can't keep pushing my head for more complicated stuffs, lol. But I'm coping well.

Oh,how i wish i could,now just simple things i can but when it comes dividing, and multipling i have to hang it up and go for the calculator.Now i no that sounds awful but i have for got a lot of what i learned in school.

I probably could do the higher levels of addition in my head, but usually grab for the calculator instead if it is handy-- it is just faster to do it that way. Any kind of subtraction or double digit multiplication, I always use the calculator.

I love Mathematics when i am still studying. I can calculate numbers orally fast even without calculators, but now since i got a job, even my job relates with numbers i often rely on computers to do the calculations and so my mind become dull in calculating numbers orally.

I can do bit complicated ones, like the example you gave in my head. However when the figures get larger than four digits I have problem. I can do multiplication tables up to 25. So, I hardly use the calculator. In fact, I do not have one.

If asked this question 10 years ago or so...I would have to say I can do mental math pretty good. But after years of spending a lot of time in front of a computer, with my cellphone, my mental math abilities just started going out to window. I think it takes a lot of practice to keep doing it.