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Question

Plato was born in '429BC‘ and died in ’348BC'. How long did he live?


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Solution

Step:Finding the number of year's plato lived.

He was born in 429BC =-429 (BC is denoted by a ‘-’ sign and AD is denoted by a ‘+’ sign)

He died in 348BC =-348BC

For finding how long he lived, we shall subtract his birth year from his death year=-348--429

=-348+additiveinverseof-429

(In subtraction, we add the additive inverse of the number to be subtracted)

=-348+429

=81 years

Therefore, Pluto lived for 81years


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