Adding three-digit numbers 100 to 700 (Horizontal Questions - Half Page x 2)

This basic Addition worksheet is designed to help kids practice adding three-digit numbers (100 through 700) with addition questions that change each time you visit. This math worksheet is printable and displays two half page math sheets with Horizontal 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 ... 700+100
  • 100+101, 101+101, 102+101, 103+101, 104+101, 105+101 ... 700+101
  • 100+102, 101+102, 102+102, 103+102, 104+102, 105+102 ... 700+102
  • ...
  • 100+700, 101+700, 102+700, 103+700, 104+700, 105+700 ... 700+700
ANSWER KEY
494 + 331 =
 825
237 + 132 =
 369
512 + 446 =
 958
480 + 154 =
 634
134 + 150 =
 284
223 + 472 =
 695
556 + 578 =
 1134
337 + 263 =
 600
126 + 523 =
 649
318 + 426 =
 744
100 + 499 =
 599
518 + 584 =
 1102
566 + 664 =
 1230
509 + 607 =
 1116
132 + 465 =
 597
314 + 143 =
 457
510 + 666 =
 1176
366 + 497 =
 863
481 + 315 =
 796
662 + 452 =
 1114
164 + 390 =
 554
183 + 215 =
 398
200 + 312 =
 512
280 + 130 =
 410
678 + 500 =
 1178
310 + 688 =
 998
212 + 577 =
 789
676 + 202 =
 878
547 + 239 =
 786
455 + 699 =
 1154
230 + 304 =
 534
197 + 218 =
 415
522 + 577 =
 1099
343 + 255 =
 598
222 + 590 =
 812
410 + 242 =
 652
685 + 642 =
 1327
182 + 548 =
 730
423 + 298 =
 721
172 + 163 =
 335
226 + 604 =
 830
589 + 241 =
 830

 Check this box to display the answer key

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