45 Golden Bars Of 10 In Box: Individual Beads

45 Golden Bars Of 10 In Box brings the tens of the decimal system to the shelf, each bar strung from individual beads and kept together in its box. Together with units, hundreds and thousands the child builds four-digit quantities, exchanges ten tens for one hundred and carries out operations with a quantity that can be held in the hand. Mathematics material from three years, and a refill when a set has been broken up.