Addition
854+767
1,621
687-423
264
745+412
1,157
143-122
21
45+94
139
545+398
943
543-365
178
955-598
357
679+265
944
433-269
943+780
1,723
765-412
353
357+159
516
436-367
69
800+546
1,346
764+643
1,407
643-564
79
453-267
186
548+571
1,119
487-165=
322
967+543
1,510
789-432
357
932+545
1,477
669-275
394
900+632
1,532