Adding, subtracting, & multiplying 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

How do you multiply decimals?

Back

To multiply decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors and place the decimal point in the product accordingly.

Front

What is the product of 62.9 and 6.4?

Back

The product of 62.9 and 6.4 is 402.56.

Front

What is the product of 0.578 and 0.23?

Back

The product of 0.578 and 0.23 is 0.13294.

Front

What is the product of 8.18 and 2.8?

Back

The product of 8.18 and 2.8 is 22.904.

Front

What is the product of 14.29 and 1.5?

Back

The product of 14.29 and 1.5 is 21.435.

Front

What is 15.61 minus 3.088?

Back

15.61 minus 3.088 equals 12.522.

Front

What is the importance of aligning decimal points in addition and subtraction?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.