Estimating Sums Worksheet
Practice estimating sums of whole numbers and decimals to the nearest ten, hundred, thousand, or whole number.
Includes
Standards
Topics
Estimating Sums
Name:
Date:
Score:
Read each question carefully and estimate the sum by rounding the numbers as instructed. Show your work.
1. Estimate the sum of 47 + 82 by rounding each number to the nearest ten.
47 rounded to the nearest ten is .
82 rounded to the nearest ten is .
Estimated sum:
2. Estimate the sum of 123 + 387 by rounding each number to the nearest hundred.
123 rounded to the nearest hundred is .
387 rounded to the nearest hundred is .
Estimated sum:
3. Estimate the sum of 5.6 + 3.2 by rounding each number to the nearest whole number.
4. Estimate the sum of 12.85 + 7.15 by rounding each number to the nearest whole number.
5. When estimating the sum of 23 + 68 to the nearest ten, the estimated sum is 90.
True
False
6. The estimated sum of 4.9 + 7.2, rounded to the nearest whole number, is 13.
True
False
7. Which of the following is the best estimate for the sum of 189 + 312 by rounding to the nearest hundred?
400
500
600
700
8. A grocery store sold 345 apples and 261 oranges. About how many fruits were sold in total, rounding to the nearest ten?
500
600
610
620
9. Sarah has $14.75 and John has $28.30. Estimate how much money they have altogether by rounding each amount to the nearest dollar.
10. A school ordered 789 pencils and 412 erasers. Approximately how many writing supplies did they order in total, rounding to the nearest hundred?
Related Worksheets
Writing Three-Digit Numbers
Practice writing three-digit numbers in standard form, word form, and expanded form.
Least Common Multiple (LCM) Worksheet
Practice finding the least common multiple (LCM) of two or more numbers using various methods.
Identifying Three-Digit Numbers
A worksheet to help students practice identifying and understanding three-digit numbers, including place value and numerical representation.
Grade 5 Estimation Worksheet
A worksheet for 5th graders to practice estimation skills with whole numbers, decimals, and problem-solving.
Grade 5 Place Value Worksheet
A worksheet for 5th graders to practice identifying place value of digits in whole numbers and decimals.
Grade 5 Estimation Worksheet
A worksheet for 5th graders to practice estimation skills with whole numbers, decimals, and problem-solving.
Powers of Ten Worksheet
A Grade 5 Math worksheet focusing on understanding and calculating powers of ten, including multiplication and division.
Number Families Worksheet
Explore number families with this Grade 5 math worksheet focusing on whole numbers, integers, rational numbers, and their properties.