This is quite an embarrassing question, but what does it mean subtracting A from B?

  1. B - A (correct, in my opinion)
  2. A - B

I got a bit confused and I wouldn't err all the exercise because of this little confusion.

  • If you are subtracting a from b, then you are taking away a from b, or mathematically subtracting a is the same as adding the opposite of a, ie b + (-a) = b - a. Sep 18, 2014 at 20:36
  • What an old question about dyslexia.
    – Lambie
    May 3, 2021 at 19:45

3 Answers 3


You are correct (Both linguistically and mathematically)

We start with B and remove A


"Subtract A from B" means "From B, subtract A", which equals "B - A".


Just remember that subtracting A FROM B means you are taking away A FROM B. It's the opposite of adding A TO B. You ADD something TO something else; you SUBTRACT something FROM something else.

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