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

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 the sum of 1.70 + 4.65?

Back

6.35

Front

What is 987.4 - 321.70?

Back

665.7

Front

If Lia bought popcorn and a slushy for $8.50 and James bought a slushy and nachos for $12.00, how much did they spend total?

Back

$26.50

Front

What is the total weight of a 52.93 oz bag of barbeque chips and a 79.6 oz bag of regular chips?

Back

132.53 ounces

Front

What is 80.93 - 68?

Back

12.93

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting the number to a nearby value that is simpler, often to a certain number of decimal places.

Front

What is the place value of the digit 5 in the number 3.456?

Back

The place value of 5 in 3.456 is 'tenths'.