A long division in which most or all of the digits are replaced by a symbol (usually asterisks) to form a cryptarithmetic.
Skeleton Division
See also
CryptarithmeticExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Skeleton Division." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SkeletonDivision.html