- $$102 + \boxed{24} = 126$$
- $$543 + \boxed{9} = 552$$
- $$915 - \boxed{858} = 57$$
- $$804 - \boxed{706} = 98$$
- $$644 + \boxed{280} = 924$$
- $$317 + \boxed{466} = 783$$
- $$37 + \boxed{326} = 363$$
- $$984 - \boxed{548} = 436$$
- $$646 + \boxed{149} = 795$$
- $$423 - \boxed{385} = 38$$
- $$99 + \boxed{551} = 650$$
- $$302 + \boxed{48} = 350$$
- $$339 + \boxed{522} = 861$$
- $$209 + \boxed{40} = 249$$
- $$532 - \boxed{479} = 53$$
- $$562 - \boxed{270} = 292$$
- $$276 + \boxed{66} = 342$$
- $$603 + \boxed{6} = 609$$
- $$876 - \boxed{873} = 3$$
- $$793 - \boxed{364} = 429$$
- $$530 + \boxed{144} = 674$$
- $$95 + \boxed{18} = 113$$
- $$28 + \boxed{132} = 160$$
- $$123 - \boxed{57} = 66$$
- $$315 + \boxed{35} = 350$$
- $$453 + \boxed{325} = 778$$
- $$882 - \boxed{55} = 827$$
- $$169 - \boxed{82} = 87$$
- $$490 + \boxed{416} = 906$$
- $$36 + \boxed{172} = 208$$
- $$322 + \boxed{-111} = 213$$
- $$45 + \boxed{23} = 68$$
- $$102 + \boxed{379} = 481$$
- $$184 + \boxed{547} = 731$$
- $$540 - \boxed{493} = 47$$
- $$87 + \boxed{175} = 262$$
- $$188 + \boxed{78} = 266$$
- $$35 + \boxed{485} = 520$$
- $$404 - \boxed{350} = 54$$
- $$949 + \boxed{39} = 988$$
- $$93 + \boxed{309} = 402$$
- $$647 + \boxed{341} = 988$$
- $$851 - \boxed{802} = 49$$
- $$745 + \boxed{11} = 76$$
- $$197 + \boxed{638} = 835$$
- $$137 + \boxed{721} = 858$$
- $$462 - \boxed{313} = 149$$
- $$463 - \boxed{289} = 174$$
- $$363 + \boxed{0} = 363$$
- $$158 + \boxed{684} = 842$$
- $$565 - \boxed{382} = 183$$
- $$133 + \boxed{-31} = 102$$
- $$255 + \boxed{397} = 652$$
- $$182 + \boxed{534} = 716$$
- $$342 + \boxed{-27} = 355$$
- $$247 - \boxed{16} = 231$$
- $$641 + \boxed{272} = 913$$
- $$83 + \boxed{564} = 647$$
- $$992 - \boxed{121} = 871$$
- $$360 + \boxed{194} = 554$$
- $$66 + \boxed{588} = 654$$
- $$817 + \boxed{129} = 946$$
- $$699 - \boxed{331} = 368$$
- $$516 - \boxed{7} = 509$$
| - $$37 + \boxed{906} = 943$$
- $$97 + \boxed{559} = 656$$
- $$36 + \boxed{585} = 621$$
- $$207 + \boxed{21} = 228$$
- $$49 + \boxed{576} = 625$$
- $$98 + \boxed{39} = 137$$
- $$220 + \boxed{130} = 350$$
- $$752 + \boxed{-650} = 102$$
- $$425 + \boxed{-383} = 428$$
- $$467 + \boxed{-266} = 201$$
- $$157 + \boxed{73} = 230$$
- $$195 + \boxed{106} = 301$$
- $$202 + \boxed{784} = 986$$
- $$530 + \boxed{-71} = 469$$
- $$188 + \boxed{199} = 387$$
- $$437 + \boxed{99} = 536$$
- $$687 + \boxed{273} = 960$$
- $$407 + \boxed{825} = 418$$
- $$300 + \boxed{338} = 638$$
- $$330 + \boxed{813} = 483$$
- $$729 + \boxed{8} = 737$$
- $$466 + \boxed{311} = 777$$
- $$144 + \boxed{501} = 645$$
- $$73 + \boxed{245} = 172$$
- $$337 + \boxed{87} = 424$$
- $$643 + \boxed{723} = 80$$
- $$705 + \boxed{235} = 940$$
- $$135 + \boxed{282} = 147$$
- $$163 + \boxed{766} = 929$$
- $$412 + \boxed{881} = 469$$
- $$153 + \boxed{16} = 169$$
- $$210 + \boxed{936} = 726$$
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