Abaco 100 with numbers

Ideal as an arithmetic aid. The counting and calculating frame Abaco has an edge length of 22 cm and has red and blue balls with printed numbers. The numbers simplify many exercises and also extend the use of the calculator. By a small hand movement the balls can be turned over, so that the grey underside appears and the balls become invisible. Therefore, only the balls and numbers that are needed for the respective arithmetic operations are visible. How is the Abaco counting and calculating frame used in the classroom? The calculating frame is an ideal and versatile aid in mathematics lessons. Your pupils can carry out the following arithmetic operations independently and then check them independently: Discover patterns and regularities Find numbers on the hundreds table Name the predecessor and successor of a number Number dictations Solve and check calculations Dice games with tens and ones cubes.