I often think of an equation as a sentence because 202/9≈22 is the same as "two hundred two divided by nine approximately equals 22" just 1 is in words and the other is numerical. I am still working on my series of novels and I have gotten to a part of a chapter where a lot of math is done and I want to write it numerically because of these reasons: 1) when it is written in mathematical(or numerical) form it is easier to read than in word form 2) This will give examples of certain things in math like approximation to people who either don't know it or don't use it much and thus don't remember how it is done However when I put it in Microsoft Word in the mathematical or numerical form it says it is a fragment and should be combined in a sentence. I'm sorry but if I put in "225/10≈23, 225-23=202 etc. it seems like there are too many sentences in 1. Equations are mathematical sentences and should be treated as complete sentences in word processors.