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A childhood belief about counting

I used to believe I had re-invented mathematics. I didn't like to learn the table of multiplication so I looked for an easy way out. I decided that if I didn't know what e.g "9 x 6" was I would deduct one from the first number and add one to the next number ( or the other way around)till it was a multiplication I actually knew. e.g "9 x 6" is "10 x 5" so I knew the answer to that one "50"! The teacher didn't quite understand how I came up with those numbers....

— Kathleen D

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