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The digit sequence 123456789

Yazar:spkwan

Insert plus/minus sign(s) in between the digit sequence yielding an arithmetic expression equal/closest to ...

Reference 1: cut-the-knot

https://www.cut-the-knot.org/do_you_know/digits.shtml

Reference 2: world of numbers

http://www.worldofnumbers.com/ninedig1.htm

Reference 3: nrich

Reference 3: nrich — https://nrich.maths.org/1013

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