Write the Estimated & Actual Sum for 3-Digit Addends

Name Grade School
Date Questions10 Score

example
Addition
236
 423
sum
Estimated Sum
240
 420
660
Actual Sum
236
 423
659
1
Addition
534
 216
sum
Estimated Sum

  
 
Actual Sum

  
 
2
Addition
486
 415
sum
Estimated Sum

  
 
Actual Sum

  
 
3
Addition
269
 522
sum
Estimated Sum

  
 
Actual Sum

  
 
4
Addition
159
 132
sum
Estimated Sum

  
 
Actual Sum

  
 
5
Addition
421
 530
sum
Estimated Sum

  
 
Actual Sum

  
 
6
Addition
553
 421
sum
Estimated Sum

  
 
Actual Sum

  
 
7
Addition
242
 639
sum
Estimated Sum

  
 
Actual Sum

  
 
8
Addition
133
 465
sum
Estimated Sum

  
 
Actual Sum

  
 
9
Addition
464
 435
sum
Estimated Sum

  
 
Actual Sum

  
 
10
Addition
322
 413
sum
Estimated Sum

  
 
Actual Sum

  
 

Answers Key
1
Addition
534
 216
sum
Estimated Sum
530
 220
750
Actual Sum
534
 216
750
2
Addition
486
 415
sum
Estimated Sum
490
 420
910
Actual Sum
486
 415
901
3
Addition
269
 522
sum
Estimated Sum
270
 520
790
Actual Sum
269
 522
791
4
Addition
159
 132
sum
Estimated Sum
160
 130
290
Actual Sum
159
 132
291
5
Addition
421
 530
sum
Estimated Sum
420
 530
950
Actual Sum
421
 530
951
6
Addition
553
 421
sum
Estimated Sum
550
 420
970
Actual Sum
553
 421
974
7
Addition
242
 639
sum
Estimated Sum
240
 640
880
Actual Sum
242
 639
881
8
Addition
133
 465
sum
Estimated Sum
130
 470
600
Actual Sum
133
 465
598
9
Addition
464
 435
sum
Estimated Sum
460
 440
900
Actual Sum
464
 435
899
10
Addition
322
 413
sum
Estimated Sum
320
 410
730
Actual Sum
322
 413
735

Worksheet for Estimate the Sum by Nearest Ten

Estimated sum of 3-digit numbers addition by rounding to the nearest ten 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 10.

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 ten 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 ten 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 10.

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