"Subtraction." . . "Subtraction Juvenile literature." . . "Mathematical recreations Juvenile literature." . . "Mathematical recreations." . . . . . . . "Juvenile works"@en . "Juvenile works" . "An illustrated and entertaining way of working with subtraction."@en . "An illustrated and entertaining way of working with subtraction." . . . . . . . . . . . . . . "Subtraction: Discovering math"@en . . . . . . . "An introduction to the world of mathematics focusing on one basic dimension of math with games, puzzles, and riddles that make learning the fundamentals of math fun."@en . . . . "Subtraction / M"@en . "Subtraction"@en . "Subtraction" . "Problems, exercises, etc"@en . "Mathématiques." . . . .