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Explain how an estimate b elps you to place the decimal point when multiplying 3.9×5.3
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Explain how an estimate b elps you to place the decimal point when multiplying 3.9×5.3

User Estobbart
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 The estimate, 4 × 5 = 20, helps me know that the decimal point should be placed so that the answer is close to 20.
User Amp
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