An abacus is an ancient tool used for counting, consisting of a framed set with rods on which balls or beads are moved. The abacus has been in existence in China since the second century BCE, although ...

The abacus has taken many forms over the centuries. In Medieval and Renaissance Europe, merchants commonly did calculating by moving wooden or metal counters along lines drawn on a wooden table known ...

The abacus, a simple counting aid, may have been invented in Babylonia (now Iraq) in the fourth century B.C. The Antikythera mechanism, used for registering and predicting the motion of the stars ...

Maths KS1: Adding 2 to 2. videoMaths KS1: Adding 2 to 2 Rod learns about the addition of 2 plus 2 by counting on his special abacus. Maths KS1: Adding 2 to 8. videoMaths KS1: Adding 2 to 8 Rodd ...