Adding three-digit numbers 100 to 400 (Vertical Questions - Full Page)

This basic Addition worksheet is designed to help kids practice adding three-digit numbers (100 through 400) 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, 103+100, 104+100, 105+100 ... 400+100
  • 100+101, 101+101, 102+101, 103+101, 104+101, 105+101 ... 400+101
  • 100+102, 101+102, 102+102, 103+102, 104+102, 105+102 ... 400+102
  • ...
  • 100+400, 101+400, 102+400, 103+400, 104+400, 105+400 ... 400+400
ANSWER KEY
376
+ 182
558
328
+ 279
607
175
+ 132
307
364
+ 274
638
234
+ 156
390
217
+ 200
417
400
+ 344
744
206
+ 355
561
132
+ 271
403
290
+ 307
597
239
+ 235
474
175
+ 128
303
307
+ 319
626
259
+ 153
412
365
+ 203
568
209
+ 127
336
109
+ 345
454
234
+ 300
534
126
+ 105
231
148
+ 226
374
211
+ 194
405
334
+ 145
479
241
+ 348
589
376
+ 347
723
184
+ 124
308
375
+ 229
604
174
+ 369
543
217
+ 216
433
358
+ 286
644
242
+ 158
400
117
+ 205
322
254
+ 124
378
164
+ 149
313
276
+ 281
557
224
+ 219
443
247
+ 130
377
140
+ 147
287
176
+ 163
339
229
+ 174
403
240
+ 239
479
101
+ 277
378
129
+ 295
424
272
+ 387
659
355
+ 188
543
222
+ 370
592
351
+ 198
549
361
+ 130
491
341
+ 239
580
172
+ 226
398
194
+ 142
336
102
+ 284
386
250
+ 305
555
267
+ 332
599
106
+ 252
358
350
+ 189
539
292
+ 163
455
141
+ 232
373
377
+ 392
769
241
+ 112
353
305
+ 248
553
281
+ 360
641
219
+ 305
524
236
+ 324
560
182
+ 285
467

 Check this box to display the answer key

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