Rounding decimals to the nearest whole number

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What is rounding?

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Rounding is the process of adjusting the value of a number to make it simpler and easier to work with, usually to the nearest whole number.

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What does it mean to round to the nearest whole number?

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Rounding to the nearest whole number means finding the closest whole number to a given decimal.

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CCSS.5.NBT.A.4

Front

How do you determine whether to round up or down?

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If the decimal part is 0.5 or greater, round up. If it is less than 0.5, round down.

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

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Round 1.82 to the nearest whole number.

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2

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CCSS.5.NBT.A.4

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Round 1.823 to the nearest whole number.

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2

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CCSS.5.NBT.A.4

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Which of the following is 12 when rounded to the nearest whole number: 11.23, 11.56, 12.51, 12.64?

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11.56

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CCSS.5.NBT.A.4

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Round 3.723 to the nearest whole number.

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4

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CCSS.5.NBT.A.4

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Round 45.501 to the nearest whole number.

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46

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CCSS.5.NBT.A.4

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What is the nearest whole number to 4.49?

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4

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CCSS.5.NBT.A.4

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What is the nearest whole number to 7.50?

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8

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CCSS.5.NBT.A.4