Module 5: Operations with 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 5/10.

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 numbers and place the decimal point in the product accordingly.

Front

What is the process to 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 0.4 × 1.2?

Back

0.48

Front

If Marta walked at 3.9 miles per hour for 0.72 hours, how far did she walk?

Back

2.808 miles

Front

How do you find the difference between two decimal numbers?

Back

To find the difference, subtract the smaller number from the larger number, ensuring to align the decimal points.

Front

What is the result of 0.07 × 1.22?

Back

0.0854

Front

How do you convert a fraction to a decimal?

Back

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

Front

What is the total distance Homer ran on Saturday and Sunday if he ran 3.218 km on Saturday and 2.41 km on Sunday?

Back

5.628 km