Adding and Subtracting Decimals

Front

What is the process of adding decimals?

Back

To add decimals, align the numbers by the decimal point and add each column starting from the right, carrying over if necessary.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract each column starting from the right, borrowing if necessary.

Front

What is the value of 20 - 2.15 - 6.58?

Back

The value is 11.27.

Front

What is the total cost of 1 microscope at $30.50 and 2 thermometers at $17.77 each?

Back

The total cost is $66.04.

Front

What addition equation results in 7.29?

Back

The equation is 4.18 + 3.11.

Front

If each item costs $2.50, what is the total cost for 3 items?

Back

The total cost is $7.50.

Front

What is the result of 12.61 - 5.04?

Back

The result is 7.57.

Front

Why is it important to align 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.

Front

What is a common mistake when adding or subtracting decimals?

Back

A common mistake is misaligning the decimal points, which can lead to incorrect sums or differences.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator.