Rounding Decimals: Key Concepts and Techniques

Why is rounding considered a crucial skill?

• It simplifies complex equations.

• It decreases the value of numbers.

• It increases the value of numbers.

• It makes numbers easier to work with.

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CCSS.3.NBT.A.1

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What determines if a number is rounded up or stays the same?

• The digit in the ones place.

• The digit to the left of the rounded place.

• The digit in the thousands place.

• The digit to the right of the rounded place.

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CCSS.3.NBT.A.1

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What happens to digits to the right of the rounded place when rounding decimals?

• They are converted to zeros.

• They are doubled.

• They are removed.

• They are left unchanged.

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CCSS.3.NBT.A.1

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What is the rounded value of 6.78 to the nearest tenth?

• 6.0

• 6.8

• 7.0

• 6.7

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CCSS.5.NBT.A.4

What mnemonic device can help remember rounding rules?

• Five or more, let it soar; four or less, let it rest.

• Five or more, raise the score; four or less, let it rest.

• Five or more, add one more; four or less, keep the mess.

• Five or more, to the floor; four or less, no more stress.

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CCSS.3.NBT.A.1

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After rounding 0.455 to the nearest hundredth, what is the result?

• 0.5

• 0.4

• 0.46

• 0.45

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CCSS.5.NBT.A.4

When rounding to the nearest whole number, what does 3.8 round to?

• 4.0

• 3.0

• 4

• 3

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CCSS.5.NBT.A.4

What is the final rounded answer for 27.7392 to the nearest thousandth?

• 27.7

• 27.74

• 27.739

• 28

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CCSS.5.NBT.A.4

How do zeros to the right of a decimal affect its value after rounding?

• They decrease its value.

• They make it a whole number.

• They increase its value.

• They do not change its value.

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CCSS.5.NBT.A.4

What is the rounded value of a very long decimal to the nearest tenth if the digit to the right is nine?

• It is rounded up.

• It becomes zero.

• It remains unchanged.

• It is rounded down.

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CCSS.5.NBT.A.4