Add and Subtract Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) separating 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, 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 0.1 in fraction form?

Back

0.1 is equal to 1/10.

Front

What is the value of 0.25 in fraction form?

Back

0.25 is equal to 1/4.

Front

What is the result of 6.7 - 2.33?

Back

4.37

Front

What is the result of 91.55 + 7.6?

Back

99.15

Front

What is the result of 4.2 + 7.98?

Back

12.18

Front

What is the result of 7.2 - 4.3?

Back

2.9

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.