36 - 27+9=, 52 - 33+19=, 81 - 56+25=, 65 - 26+39=, 71 - 32+39=, 85 - 38+47=, 94 - 45+49=, 93 - 68+25=, 91 - 74+17=,

Addition with Regrouping in Ones

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