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addition of 3 digit number with regrouping

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  • 642 + 351 =
    993
  • 731 + 258 =
    989
  • 234 + 415 =
    649
  • 456 + 378 =
    834
  • 345 + 127 =
    472
  • 317 + 426 =
    743
  • 478 + 213 =
    691
  • 823 + 147 =
    970
  • 612 + 489 =
    1,101
  • 123 + 256 =
    379
  • 569 + 342 =
    911
  • 764 + 218 =
    982
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