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2 and 3 digit addition

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  • 600 +150
    750
  • 623 +121
    744
  • 231 +100
    331
  • 234 +112
    346
  • 345 +212
    557
  • 510 +200
    710
  • 35 +22
    57
  • 134 +352
    486
  • 67 +12
    78
  • 24 +53
    77
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