22 + 14 = - 36, 83 -  10 = - 73, 31 + 51 = - 82, 15 - 4 = - 11, 80 - 12 = - 68, 48 + 51 = - 99, 81 -  21 = - 60, 78 + 10 = - 88, 38 - 28 = - 10, 42 + 16 = - 58, 39 - 11 = - = 28, 55 + 11 - 66,

2 digit Compose or Decompose

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