Write the Estimated & Actual Sum for 3-Digit Addends

Name Grade School
Date Questions10 Score

example
Addition
326
 513
sum
Estimated Sum
300
 500
800
Actual Sum
326
 513
839
1
Addition
624
 306
sum
Estimated Sum

  
 
Actual Sum

  
 
2
Addition
576
 505
sum
Estimated Sum

  
 
Actual Sum

  
 
3
Addition
359
 612
sum
Estimated Sum

  
 
Actual Sum

  
 
4
Addition
249
 222
sum
Estimated Sum

  
 
Actual Sum

  
 
5
Addition
511
 620
sum
Estimated Sum

  
 
Actual Sum

  
 
6
Addition
643
 511
sum
Estimated Sum

  
 
Actual Sum

  
 
7
Addition
332
 729
sum
Estimated Sum

  
 
Actual Sum

  
 
8
Addition
223
 555
sum
Estimated Sum

  
 
Actual Sum

  
 
9
Addition
554
 525
sum
Estimated Sum

  
 
Actual Sum

  
 
10
Addition
412
 503
sum
Estimated Sum

  
 
Actual Sum

  
 

Answers Key
1
Addition
624
 306
sum
Estimated Sum
600
 300
900
Actual Sum
624
 306
930
2
Addition
576
 505
sum
Estimated Sum
600
 500
1100
Actual Sum
576
 505
1081
3
Addition
359
 612
sum
Estimated Sum
400
 600
1000
Actual Sum
359
 612
971
4
Addition
249
 222
sum
Estimated Sum
200
 200
400
Actual Sum
249
 222
471
5
Addition
511
 620
sum
Estimated Sum
500
 600
1100
Actual Sum
511
 620
1131
6
Addition
643
 511
sum
Estimated Sum
600
 500
1100
Actual Sum
643
 511
1154
7
Addition
332
 729
sum
Estimated Sum
300
 700
1000
Actual Sum
332
 729
1061
8
Addition
223
 555
sum
Estimated Sum
200
 600
800
Actual Sum
223
 555
778
9
Addition
554
 525
sum
Estimated Sum
600
 500
1100
Actual Sum
554
 525
1079
10
Addition
412
 503
sum
Estimated Sum
400
 500
900
Actual Sum
412
 503
915

Worksheet for Estimate the Sum by Nearest Hundred

Estimated sum of 3-digit numbers addition by rounding to the nearest hundred worksheet with answers to practice & learn 3rd grade math problems on estimation is available online for free in printable & downloadable (pdf & image) format. Tap on PRINT, PDF or IMAGE button to print or download this 3rd grade estimated addition worksheet for quick approximation by rounding the 3-digit addends to the nearest 100.

How to Use this Worksheet

In this third grade math worksheet, students are required to write the estimated sum & actual sum for the given 3-digit addends by rounding off to the nearest hundred as like in the given solved example of this online workbook for estimation problems. To find the estimated sum, round the given 3-digit addends to the nearest hundred numbers and then perform the addition. To find the actual sum, add the given 3-digit addends directly and write the sum.

Answers Key

Teachers, parents or students can check or validate the completed math workbook containing the 3rd grade math questions for writing estimated & actual sum for 3-digit addition by using the corresponding answers key.

Generate More Worksheets

To effectively assist math learning or teaching, Maths AI allow registered students, teachers or parents to generate unlimited set of grade-3 math questions & answers by using this "NEW WORKSHEET" button to prepare or practice exam, assignments, classwork or homework problems & solutions on estimated sum for 3-digit numbers by rounding addends to the nearest 100.

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