SSAT数学求解:what is the average of the first 50 positive integers?

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SSAT数学求解:what is the average of the first 50 positive integers?

SSAT数学求解:what is the average of the first 50 positive integers?
SSAT数学求解:what is the average of the first 50 positive integers?

SSAT数学求解:what is the average of the first 50 positive integers?
(50+1)/2