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 that represents 5/10.

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 9.43 - 3.34?

Back

6.09

Front

What is the value of 55.78 + 4.6?

Back

60.38

Front

What is the difference between 39.3 and 17.6?

Back

21.7

Front

What is the value of 7.05 - 4.6?

Back

2.45

Front

What is the value of 80.93 - 68?

Back

12.93

Front

Why is it important to line 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

What is the term for the number that is being subtracted in a subtraction problem?

Back

The term is called the 'subtrahend.'