Add and Subtract Decimals

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It represents a part of a whole number, using a dot (.) to separate the whole number from the fractional part.

Front

How do you add decimals?

Back

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

Front

What is the value of 6.7 - 2.33?

Back

4.37

Front

If Abby buys a game for $7.89 and batteries for $5.49, how much change does she receive from a $20 bill?

Back

$6.62

Front

How much change will Layla receive after spending $5.70 on cupcakes, $1.50 on juice, and $3.50 on ice cream with $15?

Back

$4.30

Front

What is the total time taken by Caleb (21.49 seconds), Brad (21.59 seconds), and Vick (20.3 seconds) to complete a race?

Back

63.38 seconds

Front

How much farther did Ms. Hvozdik run (12.3 miles) than Ms. Chaney (4.9 miles)?

Back

7.4 miles

Front

What is the first step in adding or subtracting decimals?

Back

The first step is to align the numbers by the decimal point.

Front

Why is it important to line up decimal points when adding or subtracting?

Back

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