Worksheet on Adding 3-Digit Numbers
Practice the questions given in the worksheet on adding 3-digit numbers. The questions are based on adding 3-digit problems that do not require regrouping (no regrouping) where 3 addends are needed to arrange in a vertical order to add easily.
We first arrange them one below the other in place value columns and then regroup 10 ones to one ten, 10 tens to 1 hundred, if required.
Now, answer the following questions to quickly recap what you have learnt about addition.
I. Add the following:
(i) 320 + 200 = _____
(ii) 515 + 230 = _____
(iii) 700 + 150 = _____
(iv) 180 + 20 = _____
(v) 260 + 40 = _____
(vi) 650 + 250 = _____
(vii) 789 + 11 = _____
(viii) 231 + 119 = _____
II. Add the following numbers (three-digit numbers):
(i) 485 + 513 = _____
(ii) 586 + 301 = _____
(iii) 845 + 132 = _____
(iv) 452 + 523 = _____
(v) 356 + 621 = _____
(vi) 735 + 213 = _____
(vii) 642 + 254 = _____
(viii) 316 + 462 = _____
(ix) 560 + 316 = _____
(x) 361 + 417 = _____
(xi) 654 + 211 = _____
(xii) 506 + 273 = _____
(xii) 361 + 628 = _____
(xiv) 253 + 422 = _____
(xv) 523 + 363 = _____
(xvi) 717 + 252 = _____
(xvii) 512 + 234 = _____
(xix) 294 + 504 = _____
(xx) 284 + 305 = _____
(xxi) 745 +232 = _____
(xxii) 281 + 716 = _____
(xxiii) 812 + 103 = _____
(xxiv) 815 + 082 = _____
(xxv) 472 + 316 = _____
(xxvi) 524 + 352 = _____
(xxvii) 218 + 700 = _____
(xxviii) 531 + 444 = _____
(xxix) 145 + 834 = _____
(xxx) 100 + 304 = _____
(xxxi) 781 + 114 = _____
(xxxii) 623 + 313 = _____
(xxxiii) 300 + 300 = _____
(xxxiv) 513 + 324 = _____
III. Arrange in columns and add:
(i) 302; 315; 50
(ii) 612; 201; 122
(iii) 451; 222; 310
(iv) 302; 120; 400
IV. Fill in the blanks, using properties of addition:
(i) 528 + 600 + 318 = ……….. + 600 + 528
(ii) 429 + ……….. = 429
(iii) 199 + ……….. = 162 + 199
V. Estimate the sum to the nearest ten:
(i) 455 + 312 = _____
(ii) 218 + 607 = _____
(iii) 506 + 189 = _____
(iv) 781 + 21 = _____
VI. Addition of 3-Digit Numbers without Regrouping:
|
(i) |
H T O 9 1 0 + 8 5 ___________ |
(ii) |
H T O 8 1 1 + 1 2 1 ___________ |
|
(iii) |
H T O 2 7 0 + 4 2 6 ___________ |
(iv) |
H T O 3 4 6 + 4 1 3 ___________ |
|
(v) |
H T O 1 1 1 + 3 4 5 ___________ |
(vi) |
H T O 3 0 + 6 5 8 ___________ |
|
(vii) |
H T O 1 2 4 + 7 7 0 ___________ |
(viii) |
H T O 4 4 1 + 2 1 8 ___________ |
|
(ix) |
H T O 2 3 6 + 3 1 1 ___________ |
(x) |
H T O 1 0 5 + 5 0 1 ___________ |
VII. Add the following 3-Digit Numbers without Regrouping as shown:
|
(i) |
H T O 1 2 8 + 4 1 1 6 9 ____________ |
(ii) |
H T O 3 4 1 + 4 7 ____________ |
|
(iii) |
H T O 5 6 1 + 3 5 ____________ |
(iv) |
H T O 2 4 3 + 7 5 4 ___________ |
|
(v) |
H T O 5 9 1 + 4 0 2 ___________ |
(vi) |
H T O 4 5 2 + 2 2 1 ___________ |
|
(vii) |
H T O 5 0 6 + 4 2 1 ___________ |
(viii) |
H T O 6 0 7 + 1 1 1 ___________ |
|
(ix) |
H T O 8 0 5 + 1 6 1 ___________ |
(x) |
H T O 5 1 4 + 4 0 3 ___________ |
|
(xi) |
H T O 4 0 2 + 2 0 4 ___________ |
(xii) |
H T O 3 5 4 + 2 3 3 ___________ |
VIII. Addition of 3-Digit Numbers with Regrouping:
|
(i) |
H T O 1 5 5 + 1 7 7 ___________ |
(ii) |
H T O 1 7 8 + 6 2 4 ___________ |
|
(iii) |
H T O 2 1 7 + 4 6 9 ___________ |
(iv) |
H T O 4 4 4 + 2 2 9 ___________ |
|
(v) |
H T O 2 2 3 + 3 7 ___________ |
(vi) |
H T O 4 2 9 + 1 4 3 ___________ |
|
(vii) |
H T O 2 7 8 + 1 2 9 ___________ |
(viii) |
H T O 1 5 6 + 3 6 7 ___________ |
|
(ix) |
H T O 4 0 2 + 1 6 9 ___________ |
(x) |
H T O 1 4 9 + 3 1 6 ___________ |
IX. Addition of Two 3-Digit Numbers with Regrouping as shown:
|
(i) |
H T O 1 6 6 2 + 1 9 6 8 1 ____________ |
(ii) |
H T O 2 2 9 + 3 4 ____________ |
|
(iii) |
H T O 5 4 3 + 3 7 ____________ |
(iv) |
H T O 6 3 2 + 1 2 8 ___________ |
|
(v) |
H T O 4 3 7 + 2 2 8 ___________ |
(vi) |
H T O 3 2 7 + 3 4 6 ___________ |
|
(vii) |
H T O 4 5 1 + 1 6 4 ___________ |
(viii) |
H T O 1 6 3 + 2 9 3 ___________ |
|
(ix) |
H T O 4 6 4 + 2 5 5 ___________ |
(x) |
H T O 5 9 6 + 2 6 3 ___________ |
|
(xi) |
H T O 2 4 5 + 1 7 2 ___________ |
(xii) |
H T O 3 5 3 + 3 9 2 ___________ |
|
(xiii) |
H T O 1 4 9 + 5 0 6 ___________ |
(xiv) |
H T O 4 6 5 + 3 2 9 ___________ |
|
(xv) |
H T O 6 3 7 + 2 1 4 ___________ |
(xvi) |
H T O 7 4 5 + 1 6 3 ___________ |
|
(xvii) |
H T O 7 6 3 + 1 5 1 ___________ |
(xviii) |
H T O 1 4 5 + 1 8 2 ___________ |
Answers for the worksheet on adding three digit numbers are given below to check the exact answers of the above questions to add the 3-digit numbers that do not require regrouping.
Answers:
I. (i) 520
(ii) 745
(iii) 7850
(iv) 200
(v) 300
(vi) 900
(vii) 800
(viii) 350
II. (i) 998
(ii) 887
(iii) 977
(iv) 975
(v) 977
(vi) 948
(vii) 896
(viii) 778
(ix) 876
(x) 778
(xi) 865
(xii) 779
(xii) 989
(xiv) 675
(xv) 886
(xvi) 969
(xvii) 746
(xix) 798
(xx) 589
(xxi) 977
(xxii) 997
(xxiii) 915
(xxiv) 897
(xxv) 788
(xxvi) 876
(xxvii) 918
(xxviii) 975
(xxix) 979
(xxx) 404
(xxxi) 895
(xxxii) 936
(xxxiii) 600
(xxxiv) 837
III. (i) 667
(ii) 935
(iii) 983
(iv) 822
IV. (i) 318
(ii) 0
(iii) 162
V. (i) 770
(ii) 830
(iii) 700
(iv) 800
VI. (i) 995
(ii) 932
(iii) 696
(iv) 759
(v) 456
(vi) 688
(vii) 894
(viii) 659
(ix) 547
(x) 606
VII. (ii) 388
(iii) 596
(iv) 997
(v) 993
(vi) 673
(vii) 927
(viii) 718
(ix) 966
(x) 917
(xi) 606
(xii) 587
VIII. (i) 332
(ii) 802
(iii) 686
(iv) 673
(v) 260
(vi) 572
(vii) 407
(viii) 523
(ix) 571
(x) 465
IX. (ii) 263
(iii) 580
(iv) 760
(v) 665
(vi) 673
(vii) 615
(viii) 456
(ix) 719
(x) 859
(xi) 417
(xii) 745
(xiii) 655
(xiv) 794
(xv) 851
(xvi) 908
(xvii) 914
(xviii) 327
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