Subtraction Strip Board and box containing strips : 1 set The Discovery of the Child This is an absolute essential

This is an absolute essential part of any school's library

This is a box for wooden cubes

by Angeline Stoll Lillard

A yellow plastic box

Subtraction Strip Board and box containing strips : 1 set The Discovery of the Child This is an absolute essentialThis set includes one hardwood board with 18 numbered squares across the top and 12 squares downward. A wooden box with 9 red and 9 blue wooden strips printed with the numerals 1 9 and 18 natural wooden strips of varying lengths are provided for the exercises. The natural strips indicate the value to subtract from and the blue strips indicate the value to be subtracted.