Adding three-digit numbers, sum not exceeding 999 (Vertical Questions - Full Page)

This basic Addition worksheet is designed to help kids practice adding three-digit numbers (the result will not exceed 999) with addition questions that change each time you visit. This math worksheet is printable and displays a full page math sheet with Vertical Addition questions.

With this math sheet generator, you can easily create Addition worksheets that are never the same and always different, providing you with an unlimited supply of math sheets to use in the classroom or at home.

Each math sheet also has an optional answer key checkbox that you can select, if you wish to print an answer key to go along with your math worksheet. And there are six different question styles to choose from, as listed below.

Possible Questions:

The possible addition questions on this math worksheet are:

  • 100+100, 101+100, 102+100, ... 899+100
  • 100+101, 101+101, 102+101, ... 898+101
  • 100+102, 101+102, 102+102, ... 897+102
  • ...
  • 100+896, 101+896, 102+896, 103+896
  • 100+897, 101+897, 102+897
  • 100+898, 101+898
  • 100+899
ANSWER KEY
554
+ 239
793
632
+ 299
931
807
+ 158
965
545
+ 418
963
100
+ 891
991
253
+ 103
356
812
+ 164
976
243
+ 463
706
532
+ 219
751
651
+ 217
868
548
+ 378
926
871
+ 123
994
472
+ 206
678
435
+ 480
915
692
+ 295
987
445
+ 251
696
591
+ 102
693
389
+ 379
768
220
+ 638
858
442
+ 250
692
859
+ 122
981
273
+ 155
428
475
+ 305
780
676
+ 269
945
256
+ 559
815
552
+ 113
665
463
+ 441
904
883
+ 110
993
792
+ 154
946
778
+ 103
881
787
+ 147
934
709
+ 156
865
307
+ 590
897
686
+ 223
909
741
+ 204
945
397
+ 513
910
514
+ 147
661
430
+ 345
775
314
+ 313
627
452
+ 314
766
334
+ 584
918
342
+ 346
688
291
+ 587
878
674
+ 184
858
681
+ 188
869
392
+ 295
687
662
+ 269
931
273
+ 553
826
271
+ 467
738
423
+ 388
811
441
+ 260
701
319
+ 620
939
803
+ 180
983
567
+ 238
805
132
+ 529
661
257
+ 503
760
700
+ 226
926
645
+ 212
857
755
+ 202
957
876
+ 103
979
563
+ 123
686
373
+ 141
514
216
+ 569
785
842
+ 127
969

 Check this box to display the answer key

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