Compatible Numbers for Division

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What are compatible numbers?

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Compatible numbers are numbers that are easy to compute with mentally. They are often rounded numbers that make calculations simpler.

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Why do we use compatible numbers for division?

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We use compatible numbers for division to make estimating the quotient easier and faster, allowing us to quickly assess the reasonableness of an answer.

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You should change 76 to a compatible number.

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70.

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6.

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Choose a number that is compatible with 90.

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1,800.

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What is the first step in estimating a division problem?

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Identify the numbers involved and round them to compatible numbers.

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How can rounding help in division?

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Rounding helps simplify the numbers, making it easier to perform mental calculations.

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80.