# Lesson Worksheet: Estimating Products: Multiply Numbers up to Three Digits Mathematics • 5th Grade

In this worksheet, we will practice using rounding and compatible numbers to estimate the products of two- and three-digit numbers.

Q1:

Round 199 to the nearest hundred.

Round 14 to the nearest ten.

Use the above results to estimate the product of .

Q2:

Estimate the product by rounding the first factor to the nearest hundred and the second factor to the nearest multiple of 5.

Q3:

By rounding the number of hours in a day to the nearest ten, estimate how many times a person blinks in a day.

Is this estimate more or less than the actual number of times a person blinks in a day?

• AMore
• BLess

Q4:

Look at how Ethan estimates the product by rounding the three-digit number to the nearest hundred and the two-digit number to the nearest ten. Use his method to estimate .

Q5:

If an airplane has 176 passengers and a ticket on this airplane costs \$219, estimate the total amount of money the passengers paid by rounding both numbers to the nearest hundred.

Q6:

Estimate the product by rounding 171 to the nearest hundred and 63 to the nearest ten.

Q7:

Mia estimates the product of 289 and 17. She rounds 289 to 300 and 17 to 20. Calculate Mia’s estimate.

Q8:

Estimate the product of 200 and 19 by rounding 19 to the nearest multiple of ten.

Q9:

The product of 123 and 30 is between and . Which calculation gives the best estimate?

• A
• B

Q10:

Fill in the blank with , , or : .

• A
• B
• C