# Worksheet: Estimating the Product of Two Decimals

In this worksheet, we will practice using rounding and compatible numbers to estimate the product of two decimal numbers.

Q1:

Which of the following is the nearest to upon rounding one of the two numbers to either 10, 100, or 1,000?

• A54.78
• B547.8
• C5,478
• D54,780
• E547,800

Q2:

Elizabeth wants to buy a pair of jeans that cost \$49 .99. The sign on the display says that the jeans are off. Which expression can be used to estimate the discount?

• A
• B
• C
• D
• E

Q3:

Which of the following is closest to the result of after rounding one of the two numbers to 10, 100, or 1,000?

• A2,791.5
• B279,150
• C27.915
• D279.15
• E27,915

Q4:

Emma’s shower uses 7.8 liters of water per minute.

By rounding the number of liters to the nearest whole number, estimate how many liters she will use if her shower lasts 9 minutes.

Calculate exactly how many liters of water a 12-minute shower will consume.

Q5:

Use rounding to estimate the amount of money you need to pay for a bag of apples if one kilogram costs \$3.05 and the bag holds 7.9 kilograms.

Q6:

An African elephant can travel at a speed of 24.9 kilometers per hour. At this speed, approximately how far could an African elephant travel in 1.5 hours?

Q7:

Which choice provides the closest estimate for ?

• A
• B
• C
• D

Q8:

Use compatible numbers to estimate the product .

Q9:

Estimate .

Hint: Round each number to the nearest whole number.

Q10:

Estimate using compatible numbers.

Hint: What numbers, which you can multiply easily, are close to 73.9 and 2.1?