Explore the number range 100
The Abaco counting and calculating frame has an edge length of 22 cm and has red and blue balls. The colour of the balls alternates in rows. With a small movement of the hand, the balls can be turned over so that the grey underside appears and the balls magically disappear. This means that only the balls required for the respective arithmetic operations are ever visible.

How is the Abaco counting and calculating frame used in the classroom?
The calculator is an ideal and versatile aid in maths lessons. Your pupils can carry out the following arithmetic operations independently and then check them on their own:

• Discover patterns and regularities
• Find numbers on the hundreds table
• Name the predecessor and successor of a number
• Recognise quantity relationships
• Dividing numbers
• Number dictations
• Solving and checking calculations
• Dice games with dice of tens and ones
• Give your pupils a simple but very effective tool with the Abaco.

The extension of the Abaco 20