Worksheet: Estimation by Rounding

Section A: Rounding to the Nearest Ten

1. Round 34 to the nearest ten: ____
2. Round 58 to the nearest ten: ____
3. Round 72 to the nearest ten: ____
4. Round 89 to the nearest ten: ____
5. Round 45 to the nearest ten: ____

Section B: Rounding to the Nearest Hundred

1. Round 134 to the nearest hundred: ____
2. Round 276 to the nearest hundred: ____
3. Round 489 to the nearest hundred: ____
4. Round 523 to the nearest hundred: ____
5. Round 799 to the nearest hundred: ____

Section C: Rounding to the Nearest Thousand

1. Round 1,234 to the nearest thousand: ____
2. Round 3,567 to the nearest thousand: ____
3. Round 7,890 to the nearest thousand: ____
4. Round 4,321 to the nearest thousand: ____
5. Round 9,876 to the nearest thousand: ____

Section D: Estimation with Addition

1. Estimate the sum of 45 + 33 by rounding to the nearest ten: ____
2. Estimate the sum of 123 + 267 by rounding to the nearest hundred: ____
3. Estimate the sum of 1,234 + 3,567 by rounding to the nearest thousand: ____
4. Estimate the sum of 78 + 24 by rounding to the nearest ten: ____
5. Estimate the sum of 654 + 789 by rounding to the nearest hundred: ____

Section E: Estimation with Subtraction

1. Estimate the difference of 76 – 29 by rounding to the nearest ten: ____
2. Estimate the difference of 345 – 123 by rounding to the nearest hundred: ____
3. Estimate the difference of 8,432 – 3,678 by rounding to the nearest thousand: ____
4. Estimate the difference of 92 – 47 by rounding to the nearest ten: ____
5. Estimate the difference of 875 – 432 by rounding to the nearest hundred: ____

Section F: Word Problems

1. Maria has 247 marbles, and she buys 376 more marbles. Estimate the total number of marbles she has by rounding to the nearest hundred: ____
2. There are 3,456 students in a school. If 789 students leave for a trip, estimate the number of students left by rounding to the nearest thousand: ____
3. Tom collects 567 stamps. He gives 234 stamps to his friend. Estimate the number of stamps Tom has left by rounding to the nearest hundred: ____
4. A book has 1,234 pages. John reads 567 pages. Estimate the number of pages John has left to read by rounding to the nearest thousand: ____
5. There are 678 apples in a basket. If 123 apples are taken out, estimate the number of apples left by rounding to the nearest hundred: ____

Section G: Fun Activities

Color by Numbers (Rounding Results)

• Round each number to the nearest ten, then color the sections based on the results.
  • 20-30: Red
  • 40-50: Blue
  • 60-70: Green
  • 80-90: Yellow

Estimation Maze

• Follow the correct estimated sums to find the way out of the maze. Each correct estimate will guide you through the correct path.

(Provide a simple picture with numbered sections and a maze with estimation problems on the paths)

These worksheets provide a comprehensive set of problems designed to help your students practice estimation by rounding, starting with basic rounding and moving to more complex addition, subtraction, and word problems. Feel free to print and use these in your classroom!