NUMBER CRUNCHERS, Division Set, Set of 100

2 ÷ ? = 20 or ? ÷ 10 = 20 or 2 ÷ 10 = ? You decide! 100 bones printed black on yellow for optimum visual clarity, with a special plastic slider that conceals any one part of the number sentence at a time. Each set contains all the equations from 1 ÷ 0 = 0 to 100 ÷ 10 = 10.