# Worksheet: Estimating Products: Decimals by Whole Numbers

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

Q1:

Estimate .

• A10
• B50
• C9
• D45
• E40

Q2:

Estimate .

• A16
• B56
• C64
• D72

Q3:

Consider the product .

Estimate the product by rounding each number to its greatest place value.

Calculate the product.

Q4:

Use your rounding skills to estimate

• A18,000
• B20,000
• C1,600
• D16,000
• E12,000

Use the standard algorithm to find the exact answer. Q5:

We can estimate products by rounding each number to its greatest place value as in the example. Use this method to estimate the following products.

Estimate .

Estimate .

Q6:

Which of the following is closest to ? Solve without using a calculator.

• A3,000
• B40,000
• C300,000
• D30,000

Q7:

Noah estimates that is 9 and his friend Jacob estimates that it is 10. Whose estimate is more accurate?

• AJacob
• BNoah

Q8:

to the nearest unit.

Q9:

to the nearest tenth.