I'm 90% sure
I have dyscalculia. ...a genetically-linked learning disability which affects a person's ability to understand, remember, and/or manipulate numbers and/or number facts (e.g. the multiplication tables).
Frequent difficulties with arithmetic, confusing the signs: +, −, ÷ and ×.
Reliance on 'counting-on' strategies, e.g., using fingers
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