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3 digit addition with some regrouping

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  • 508+983
    1,491
  • 801+990
    1,791
  • 379+233
    612
  • 379+635
    1,014
  • 180+620
    800
  • 533+323
    856
  • 586+956
    1,542
  • 984+534
    1,518
  • 632+290
    922
  • 802+776
    1,578
  • 195+666
    861
  • 227+820
    1,047
  • 328+310
    638
  • 674+662
    1,336
  • 236+260
    496
  • 240+423
    663
  • 371+311
    682
  • 553+455
    1,008
  • 151+897
    1,048
  • 501+799
    1,300
  • 520+287
    807
  • 988+215
    1,203
  • 538+943
    1,481
  • 669+805
    1,474
  • 961+649
    1,610
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