Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal representation of 1/2.

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 importance of lining 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.

Front

If Tyra spent $1.25 on a coke, $4.25 on popcorn, and $3 on M&Ms, how do you find the total amount spent?

Back

Add the amounts: $1.25 + $4.25 + $3.00 = $8.50.

Front

How do you calculate change from a purchase?

Back

To calculate change, subtract the total cost of the purchase from the amount paid.

Front

If Ben bought a sandwich for $8.82 and paid with a $10 bill, how much change does he receive?

Back

$10.00 - $8.82 = $1.18.

Front

What is the process to find out how much faster one person swam than another?

Back

Subtract the time taken by the faster swimmer from the time taken by the slower swimmer.

Front

If Ms. Fletcher paid $16.72 for gas with a $20 bill, how do you find her change?

Back

$20.00 - $16.72 = $3.28.

Front

What is the value of 0.75 + 0.25?

Back

0.75 + 0.25 = 1.00.