# Simple Math - Right?

Youse guys have fun with this math equation. My math tutor just sent me one to solve… 3 Likes

This tutor is just giving hints: 6 Likes

My calculator says the answer is 1…so the correct answer is 1 no matter how someone tries to rationalize it…go argue with casio fx-9860G II

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Which math problem above are you referring to? I haven’t commented, other than posting a Youtube link about the “6 ÷ 2(1 + 2)”. 1 Like
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LOL…yes…that’s the one…the video said a hundred years ago the answer was 1 but now it’s 9…but casio says 1…so that’s it…

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It all depends on how you key it into the calculator. 6 / 2 x (1+2) always returns 9. Parentheses first and then left to right as division and multiplication have equal precedence.
If you key it in as written 6 / 2(1+2) you will get a 1. This is because the entire right expression 2(1+2) is completed first so you wind up with 6 / 6 which is 1.

Curiously while the above holds true for my handheld calculators (Casio - TI) The windows scientific calculator answers both entry methods with a 9.

My Real Calc app calculator on my phone returns 9 for either entry method but Bit Calc app will not recognize an implied operation (2(1+2)) so it returns a 2 (6 / 3).

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LOL…windows…if we’ve learn anything about the past couple of years…is that computers cannot be trusted to count…correctly…and now we know why…

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Is this that “new math” I’ve been hearing about? 1 Like

The rule is that multiplication and division have the same precedence (as do addition and subtraction). Therefore operations occur from left to right. Watch the answer video for a complete explanation. As I explained above, if you key it in the calculator and specify the multiplication, as opposed to expecting the calculator to know, you will come out with a 9.
I am confident this will be the case with your Casio fx-9860G II. Try it.

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I got 9 on my K & E. What’s a Casio?  3 Likes
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