Add new comment

Permalink In reply to by Klassy (not verified)

No they didn't choose arbitrarily, no one is supposed to always multiply before divide. It is mentioned in the article or whatever that there are different variations of the pnemonic device that people use, such as PEMDAS, BODMAS, etc. Notice how the M and the D switch places? That's because in the case of multiplication and division, its supposed to go from left to right. 9 is right

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.
  • Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.