Adding and Subtracting with Decimals

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It uses a decimal point to separate the whole number part 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, 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 value of 0.5 in cents?

Back

0.5 is equal to 50 cents.

Front

What is the change received when paying $20 for a $16.72 purchase?

Back

The change received is $3.28.

Front

Calculate 5.4 - 2.43.

Back

5.4 - 2.43 = 2.97.

Front

What is the total cost of 2 notebooks at $2.25 each and a box of markers at $3.68?

Back

The total cost is $8.18.

Front

Calculate 10.05 - 8.3.

Back

10.05 - 8.3 = 1.75.

Front

What is the first step in adding decimals?

Back

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

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.