Mathematics, 06.10.2021 14:00, gracebrownnn

Olivia adds 67,828,215 and 8,679,682. She estimates that the sum is 75,000,000. Christina estimates that the sum is 77,000,000. Which estimate is more reasonable? Explain.

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Olivia adds 67,828,215 and 8,679,682. She estimates that the sum is 75,000,000. Christina estimates...