Friday, March 28, 2008

Calculate This In Your Head

18+27-14=?

Don't use paper or a calculator. When you have the answer, leave it in Comments, but most importantly tell me how you did the calculation. You know, your thought process. I'll leave a comment too, but do the math before you read the comments so you aren't influenced.

9 comments:

Mommy's Nintendo said...

I got 31 like this:
18-14=4; 27+4=31

NotAMeanGirl said...

I got 31.

27-14=13
18+13=31

Princess Sparkle Pants said...

31, and I did it exactly like you did it.

the grandpa said...

I got 31
20+30=50
50-5=45
45-14=31

Aimee said...

31
I did it like 27-14 then plus the 18...because it was easier. But I remember MDAS from high school when you have to x, /, + and - IN THAT ORDER. My husband, to be fair to "the grandpa" in the comment above, would have TOTALLY done it that way. Round up, subtract the remainder and then do the last step. My husband is a PhD geologist/math geek. He just does things that way! I hope I'm not insulting the person above!

Princess Sparkle Pants said...

The grandpa is very silly. I am not sure if he is being honest, because he might be, and if so, I would like him to let me know if he ever needs a job! My company needs some folks with interesting logic.

Moomie said...

I solved it left to right, just like all the old math recommends and because I learned it that way several (many?) ( feels like 100?) years ago.

Favorite Cousin said...

OK..so I am a little behind on my reading. What can I say...better late then never.

I did it the same way Mommy's Nintendo did.

Mommy's Nintendo said...

You are behind, FC! but with good reason...

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