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Eric

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1 hour ago, gwalchmai said:

Solve carefully.

230 - 220 × 0.5 =

You probably won't believe it but the answer is 5!

I don't believe it.

The rules of arithmetic precedence of operators states that one performs division and multiplication from left to right and then subtraction and addition from left to right.

Thus, 220 * 0.5 is performed first yielding 110.

Then, 230 - 110 is performed yielding 120.

Enter the same sequence in any calculator, except those using Reverse Polish Notation, and you get 120.

In order to get 5 after simplifying that sequence, one would write it as (230 - 220) * 0.5.

Parentheses take precedence over the other operators.

It saddens me that we have to constantly restate what should have been learned in elementary school.

 

Edited by tous
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16 hours ago, Paul53 said:

Damn those melons are .......................inviting! Wonder if she needs a nurse to show her how to check those for cancer? I could make the sacrifice..............

No cutsies! Wait your turn in line with the rest of us, Overachiever.

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14 minutes ago, tous said:

I don't believe it.

The rules of arithmetic precedence of operators states that one performs division and multiplication from left to right and then subtraction and addition from left to right.

Thus, 220 * .05 is performed first yielding 11.

Then, 230 - 11 is performed yielding 219.

Enter the same sequence in any calculator, except those using Polish Notation, and you get 219.

In order to get 5 after simplifying that sequence, one would write it as (230 - 220) * .05.

Parentheses take precedence over the other operators.

It saddens me that we have to constantly restate what should have been learned in elementary school.

 

First off, it's .5, not .05...

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9 minutes ago, Steelharp said:

First off, it's .5, not .05...

I'm old and the print is tiny.

I am allowed tous-agraphical errors.

:599c64b322d5b_tongueout:

 

I done did fixed it.

Edited by tous
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8 hours ago, tous said:

I don't believe it.

The rules of arithmetic precedence of operators states that one performs division and multiplication from left to right and then subtraction and addition from left to right.

Thus, 220 * 0.5 is performed first yielding 110.

Then, 230 - 110 is performed yielding 120.

Enter the same sequence in any calculator, except those using Reverse Polish Notation, and you get 120.

In order to get 5 after simplifying that sequence, one would write it as (230 - 220) * 0.5.

Parentheses take precedence over the other operators.

It saddens me that we have to constantly restate what should have been learned in elementary school.

 

"Calculator"? You used a calculator? No wonder you don't believe it.

Enter "5!" into your trusty slipstick and see what you get... :supergrin:

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