The four arithmetic symbol options Dudás provided for the fill-in-the-blank math problem include addition, subtraction, multiplication and division, but only three symbols are needed.

P. H. Nygaard, Solution of Equations by Addition-Subtraction Logarithms, The American Mathematical Monthly, Vol. 37, No. 9 (Nov., 1930), pp. 486-491 ...

In recent months the phrase "addition by subtraction" seems to be seeing heavy use by sports analysts. First and foremost, this phrase makes absolutely no sense whatsoever.

BODMAS, on the other hand, stands for brackets, order, division and multiplication, and addition and subtraction. Order is synonymous with exponents in this case.

Korean children's ability to solve addition problems with sums of 10, single-digit addition problems with sums between 10 and 18, and single-digit subtraction problems with minuends between 10 and 18 ...

The confusion (likely intentional) boiled down to a discrepancy between the math rules used in grade school and in high school. By Steven Strogatz Recently I wrote about a math equation that had ...

The subtraction operation in equation (2) is realized by reversing the sequence of the addition operation, that is, the application of the π -pulse of carrier transition and the uniform blue ...