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 whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

What is the sum of 10.9 and 8.6?

Back

19.5

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 difference directly below the other decimal points.

Front

What is 7.9 - 3.47?

Back

4.43

Front

What is the total of 12.4, 8.6, and 10.9?

Back

31.9

Front

If a file is 50.30 GB and the total size is 93 GB, how do you find the size of the second file?

Back

Subtract the size of the first file from the total size: 93 - 50.30 = 42.7 GB.

Front

What is the change received from $100 after spending $61.18?

Back

$38.82

Front

If Jerry bought 6.95 lbs of jelly beans and 1.75 lbs were cherry flavor, how do you find the lime flavor?

Back

Subtract the cherry flavor from the total: 6.95 - 1.75 = 5.2 lbs.

Front

What is the importance of aligning decimal points when adding or subtracting?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.