Rounding Rally: Simplifying Decimals to the Nearest Whole

Rounding Decimals

Example 1:

Decimal to Round: \(4.58\)

Rounding to the Nearest Whole Number:

1. Look at the tenths place: \(5\).

2. Since \(5\) is equal to or greater than \(5\), round up the ones place by \(1\).

3. The tenths and other places become \(0\).

Rounded Decimal:

\(5\)

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Example 2:

Decimal to Round: \(3.42\)

Rounding to the Nearest Tenth:

1. Look at the hundredths place: \(2\).

2. Since \(2\) is less than \(5\), keep the tenths place as it is.

3. The hundredths and other places become \(0\).

Rounded Decimal:

\(3.4\)

Rounding decimals is all about simplification. Whether you’re estimating costs, measurements, or just trying to get a general idea of a value, rounding provides a more digestible number. Remember the golden rule: if the number you’re looking at is \(5\) or above, round up; otherwise, round down. With practice, you’ll be able to round decimals in a snap!

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Practice Questions:

1. Round \(5.67\) to the nearest whole number.

2. Round \(2.34\) to the nearest tenth.

3. Determine the rounded value of \(7.89\) to the nearest whole number.

4. What is \(0.505\) rounded to the nearest tenth?

5. Round \(8.213\) to the nearest hundredth.

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Answers:

1. \(6\)

2. \(2.3\)

3. \(8\)

4. \(0.5\)

5. \(8.21\)

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