ABACO 100 with numbers, red-blue, counting and calculating abacus

Abaco's popular, tried and tested counting and calculating abacuses are also available with printed numbers. This self-checking hundred square board opens up an endless variety of fun games to practise.

The balls in the rows of ten alternate between red and blue, the rear is grey. With a little finger movement to the right, each ball can be turned grey and the number value is no longer visible. This lets children practise becoming familiar with the hundred square and they can independently check the sequence of numbers or their arithmetic tasks.

The hundred square is subdivided into 4 sections, each with 5x5 balls. This makes it easy to use, and the abacus can be used by up to 4 children at the same time.
Since the plastic balls are recessed in the frame, they cannot be lost.

These counting and calculation devices can be stacked and so can be stored without taking up too much space.
With instructions and example applications.

• rotating balls, marked with the numbers 1-100
• for adding and subtracting plus counting, complementing and comparing,
• also useful for checking your own work

Dimensions: approx. 21.5 x 21.5 x 2 cm
Dimensions balls: approx. 14 mm ø

Suggestions:

• Explore patterns and regularities
• Where is number 57 hiding?
• Name the numbers before and after a particular number both horizontally (units) and vertically (tens)
• Search for all the numbers ending in 3! How are they arranged in the hundred square?
• Where do I get to, if I move 5 ball positions over to the right?
• Make number predictions
• Solve sums and check them yourself
• Invent dice games with the tens and units dice
• And plenty more