Decimal notation Memes

European decimal notation meets American decimal notation, and chaos ensues. The equation "1-0,9=0,01" looks mathematically sound to Europeans using commas as decimal separators, but utterly baffling to Americans reading it as "1 minus 0 comma 9 equals 0 comma 01." Meanwhile, mathematicians are silently screaming because 0.9 repeating actually equals 1, making this whole "theory" as solid as a chocolate beaker in a hot lab. Just another day in the international mathematics communication breakdown.