Writing mixed numbers as improper fractions

I have a 3 column grid that I want to turn into a 4 column grid. I'm having trouble editing the css, it seems to kind of work but gets broken after a few lines. This is the current css for 3 columns:

Decide math problem

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Clear up mathematic problem

Writing numbers in words and standard form

9 × 3 = 27. Step 2: Add the answer from Step 1 to the numerator (the top number in the fraction) 27 + 5 = 32. Step 3: Write answer from Step 2 over the denominator. 32 9. As an alternative, once you get comfortable with the steps
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How to Turn a 2 into a 3 or 4 by Adding Development with

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