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An abacus is a bead tool people have used to count for ages.

An abacus is a bead tool people have used to count for ages.

You slide little beads along rods to add and count. People have used the abacus for thousands of years, even before pencils.

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Counting means saying one number for each thing you touch. Counting means saying one number for each thing you touch. The last number you say tells how many there are. The last number you say tells how many there are. You can count things in any order and still get the same total. You can count things in any order and still get the same total. People often count on their fingers because we have ten of them. People often count on their fingers because we have ten of them. Zero means there is nothing there to count. Zero means there is nothing there to count.