Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.14 is a decimal.

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How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the sum directly below the other decimal points.

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How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, placing the decimal point in the difference directly below the other decimal points.

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What is rounding?

Back

Rounding is the process of adjusting a number to make it simpler, usually to the nearest whole number or decimal place.

Front

How do you round 29.74 to the nearest whole number?

Back

29.74 rounds to 30 because the digit after the decimal (7) is 5 or greater.

Front

What is the sum of 35.61 and 12.93?

Back

The sum of 35.61 and 12.93 is 48.54.

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What is the difference between two numbers?

Back

The difference is the result of subtracting one number from another.

Front

If Mariah has $33.08 and spends $5.78 and $3.25, how much does she have left?

Back

Mariah has $24.05 left after her purchases.

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What is the difference between 39.3 feet and 17.6 feet?

Back

The difference is 21.7 feet.

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How do you convert pounds to kilograms?

Back

To convert pounds to kilograms, multiply the weight in pounds by 0.453592.