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.

Front

How do you add decimals?

Back

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

Front

How do you subtract decimals?

Back

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

Front

What is the result of 7.89 - 3.2?

Back

4.69

Front

What is the result of 4.62 + 8?

Back

12.62

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting its value to make it simpler while keeping it close to the original value. For example, rounding 2.76 to the nearest whole number gives 3.

Front

What is the place value of the digit 5 in 3.45?

Back

In 3.45, the digit 5 is in the hundredths place, which means it represents 5/100 or 0.05.

Front

What is the difference between a proper decimal and an improper decimal?

Back

A proper decimal has a value less than 1 (e.g., 0.75), while an improper decimal has a value of 1 or greater (e.g., 1.25).

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator. For example, 1/4 = 0.25.

Front

What is the sum of 0.5 and 0.25?

Back

0.75