Better start saving: The price of a one-day ticket to Walt Disney World's Magic Kingdom is now $99. That's a $4 increase from the previous price hike announced in June 2013. The price hike went into effect Sunday.
Probably of Babylonian origin, an abacus is a calculating instrument that uses beads that slide along a series of wires or rods set in a frame to represent the decimal places. It is the ancestor of the modern digital calculator.
With this module, a student can easily learn the technique of calculating large numbers in mind which is also called as mental arithmetic. AbacusMaster is an animated and interactive software abacus tutorial which will help one to learn abacus quickly and effectively.