600 CrossMath Puzzles: Addition, Subtraction, Multiplication, Division | Easy To Hard Cross Math Puzzles | For Kids And Adults

CrossMath – 200 Math Crossword Puzzles for Adults: Mixing Addition, Subtraction, Multiplication & Division

Crossmath Puzzles Large Print: Addition, Subtraction, Multiplication and Division Equations, for Mental Arithmetic Practice

600 CrossMath Puzzles: Multiplication, Division, Addition, Subtraction | Easy To Hard Cross Math Puzzles | For Kids And Adults (Logic & Math)

CrossMath – 200 Logik- und Mathe-Puzzles für Erwachsene: Mit Addition, Subtraktion, Multiplikation & Division