Adding three-digit numbers, sum not exceeding 999 (Vertical Questions - Half Page x 2)

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 two half page math sheets 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
249
+ 450
699
898
+ 100
998
647
+ 151
798
554
+ 309
863
161
+ 718
879
609
+ 310
919
839
+ 127
966
581
+ 363
944
634
+ 256
890
126
+ 426
552
345
+ 104
449
801
+ 113
914
760
+ 131
891
869
+ 119
988
163
+ 228
391
403
+ 584
987
802
+ 106
908
492
+ 215
707
279
+ 454
733
228
+ 737
965
774
+ 203
977
342
+ 639
981
236
+ 178
414
490
+ 198
688
236
+ 708
944
469
+ 498
967
870
+ 112
982
563
+ 412
975
849
+ 108
957
896
+ 103
999
210
+ 585
795
156
+ 815
971
149
+ 101
250
305
+ 694
999
494
+ 353
847
835
+ 118
953
540
+ 169
709
592
+ 200
792
673
+ 167
840
555
+ 260
815
159
+ 516
675
311
+ 268
579
606
+ 332
938
261
+ 659
920
400
+ 195
595
513
+ 391
904
389
+ 132
521
410
+ 248
658

 Check this box to display the answer key

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