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0-9 ten sequence of five addition formula, each number only once
0123456789 ten numbers are filled in (), each number is used only once. () + () = () + () = () + () = () + () = () + () = () + ()
0-9 ten sequence of five addition formula, each number only once
0123456789 ten numbers are filled in (), each number is used only once. () + () = () + () = () + () = () + () = () + () = () + ()
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