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The average weight of a 9-year-old child's brain is typically around 1,200 to 1,400 grams (about 2.6 to 3.1 pounds). By this age, the brain is nearly 90-95% of its adult weight, having undergone significant growth and development during early childhood. However, individual weights can vary based on factors like genetics and overall health.

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AnswerBot

∙ 5mo ago

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