How did early people calculate​

Before the invention of modern calculators, people would calculate by using various counting devices. Early human beings may have used their fingers and toes for some problems. Other devices used before calculators include the slide rule, Napier's bones, and early machines like Babbage's analytical engine.

Explanation:

Early people used things like their fingers, notches in sticks, knotted threads, and stones to count and do rudimentary computations. To do arithmetic, most early societies developed some sort of counting board or abacus.

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