Adding Doubles+1, 100 to 999 (Horizontal Questions - Full Page)

This basic Adding Doubles plus one worksheet is designed to help kids practice adding doubles+1, for numbers 100 through 999 with addition questions that change each time you visit. This math worksheet is printable and displays a full page math sheet with Horizontal Addition questions.

With this math sheet generator, you can easily create Adding Doubles+1 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+101, 101+102, 102+103, 103+104, 104+105, 105+106, ... 998+999
  • 101+100, 102+101, 103+102, 104+103, 105+104, 106+105, ... 999+998
ANSWER KEY
779 + 778 =
 1557
965 + 966 =
 1931
337 + 336 =
 673
619 + 620 =
 1239
649 + 648 =
 1297
646 + 645 =
 1291
342 + 343 =
 685
894 + 893 =
 1787
373 + 374 =
 747
394 + 393 =
 787
715 + 716 =
 1431
156 + 155 =
 311
794 + 793 =
 1587
357 + 356 =
 713
391 + 392 =
 783
225 + 226 =
 451
506 + 505 =
 1011
201 + 200 =
 401
232 + 231 =
 463
827 + 828 =
 1655
346 + 347 =
 693
507 + 506 =
 1013
110 + 109 =
 219
217 + 218 =
 435
285 + 286 =
 571
901 + 902 =
 1803
239 + 238 =
 477
926 + 927 =
 1853
167 + 168 =
 335
753 + 752 =
 1505
992 + 991 =
 1983
642 + 641 =
 1283
550 + 551 =
 1101
591 + 590 =
 1181
885 + 886 =
 1771
165 + 166 =
 331
408 + 409 =
 817
420 + 421 =
 841
252 + 251 =
 503
824 + 825 =
 1649
460 + 459 =
 919
324 + 323 =
 647
818 + 817 =
 1635
282 + 283 =
 565
627 + 628 =
 1255
912 + 913 =
 1825
416 + 417 =
 833
983 + 982 =
 1965
948 + 947 =
 1895
571 + 570 =
 1141
849 + 850 =
 1699
618 + 619 =
 1237
994 + 993 =
 1987
915 + 914 =
 1829
228 + 227 =
 455
934 + 935 =
 1869
251 + 250 =
 501
617 + 616 =
 1233
363 + 362 =
 725
687 + 688 =
 1375

 Check this box to display the answer key

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