Exploring the number range up to 100. The counting and calculating frame Abaco has a side length of 22 cm and features red and white beads. The colors of the beads alternate in rows, making the transition between tens clear. With a small hand movement, the beads can be flipped to reveal their gray underside, making them invisible. Therefore, only the beads needed for the respective calculations are visible.

How is the counting and calculating frame Abaco used in the classroom? This calculating device is an optimal and versatile tool in mathematics education. Your students can independently perform and subsequently check the following calculations: discover patterns and regularities, find numbers on the hundred chart, name the predecessor and successor of a number, conduct number dictations, recognize quantity relationships, split numbers, solve and check calculations, and play dice games with ten and one dice.

The expansion of the Abaco 20. The big brother of our Abaco 20 makes it easy for you and your students to expand the number range up to 100. The Abaco 100 can be used independently of any textbook. Addition, subtraction, and multiplication are practiced in a particularly visual way.