Solving 5th grade math with F# and OCR

When reviewing my 10 year-old son’s homework, I like to show him how to do it programmatically and automating tedious math assignments gets his attention. The assignment is in Norwegian, but basically the task at hand is to find the largest number in each cell. The most upper left cell contains the values 1,5 , 1,0555 and 1,55 (the decimal separator in Norway is comma), so the correct answer for this cell is 1,55.

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