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 round a decimal to the nearest tenth?

Back

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

Front

What is the sum of 12.5 and 3.2?

Back

12.5 + 3.2 = 15.7

Front

What is the difference between 7.8 and 2.4?

Back

7.8 - 2.4 = 5.4

Front

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 answer directly below the other decimal points.

Front

What is the value of 0.75 + 0.25?

Back

0.75 + 0.25 = 1.00

Front

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 answer directly below the other decimal points.

Front

What is the result of 5.5 - 1.2?

Back

5.5 - 1.2 = 4.3

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to a nearby value that is simpler or more convenient, often to a specific place value like the nearest whole number or tenth.

Front

What is 10.09 - 4.35?

Back

10.09 - 4.35 = 5.74