Comparing & Rounding Decimals

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting the digits of a number to make it simpler while keeping its value close to what it was. It often involves increasing or decreasing the last digit based on the value of the digits that follow it.

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round a number to the nearest whole number?

Back

To round a number to the nearest whole number, look at the digit in the tenths place. If it is 5 or greater, round up; if it is less than 5, round down.

Tags

CCSS.5.NBT.A.4

Front

What is the rule for rounding to the nearest tenth?

Back

To round to the nearest tenth, look at the digit in the hundredths place. If it is 5 or greater, round the tenths place up by one; if it is less than 5, keep the tenths place the same.

Tags

CCSS.5.NBT.A.4

Front

How do you round to the nearest hundredth?

Back

To round to the nearest hundredth, look at the digit in the thousandths place. If it is 5 or greater, round the hundredths place up by one; if it is less than 5, keep the hundredths place the same.

Tags

CCSS.5.NBT.A.4

Front

What does it mean to compare decimals?

Back

Comparing decimals involves determining which of two or more decimal numbers is greater, lesser, or equal by looking at their digits from left to right.

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CCSS.5.NBT.A.3B

Front

How do you compare two decimal numbers?

Back

To compare two decimal numbers, align them by the decimal point and compare each digit starting from the left. The first digit that differs determines which number is greater.

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CCSS.5.NBT.A.3B

Front

What is the significance of trailing zeros in decimals?

Back

Trailing zeros in decimals do not affect the value of the number but can indicate precision. For example, 4.20 and 4.2 are equal, but 4.20 may suggest a higher level of precision.

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CCSS.5.NBT.A.3B

Front

What is the difference between 4.22 and 4.220?

Back

4.22 and 4.220 are equal in value, but 4.220 has an additional trailing zero, which may indicate a specific level of precision in measurement.

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CCSS.5.NBT.B.7

Front

How do you round $7.86 to the nearest ten cents?

Back

To round $7.86 to the nearest ten cents, look at the digit in the hundredths place (6). Since it is 5 or greater, round the tenths place (8) up to 9, resulting in $7.90.

Tags

CCSS.5.NBT.A.4

Front

What is the result of rounding 1,264.261 to the nearest tenth?

Back

When rounding 1,264.261 to the nearest tenth, look at the hundredths place (6). Since it is 5 or greater, round the tenths place (2) up to 3, resulting in 1,264.3.

Tags

CCSS.5.NBT.A.4