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:
The average person blinks about 900 times an hour.
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
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