And the answer is: 11! |
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Mathematical Order of Precedence requires
that you do the multiplication before you do the addition.
Doing it correctly:
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1+2*3+4=1+6+4=11 |
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The most common incorrect answers to this combination of numbers
are 13 and 21.
You would get 13 if you just did the math left to right. 1+2 is 3*3 is 9+4 is 13. You would get 21 if you remembered that you were supposed to do something first, but added before multiplying. 1+2=3 and 3+4=7 and 3*7=21. |
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Mathematical Order of Precedence |
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You may remember hearing the mnemonic: Please excuse my dear
Aunt Sally, even if you don't remember what it was supposed
to help you remember. Here is the correct mathematical
order of precedence and the symbols used to perform calculations
on the computer:
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