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Addition and Subtraction, 29/01/22, 45, Exercise, Add:, (b), Th HTO, Th HTO, (a), (c), Th HTO, 4856, 5612, 6058, + 2132, + 1276, + 3941, Th HTO, (d), (e), Th HTO, (f), Th HTO, 7154, 8765, 3295, 1543, 234, 603, Th HTO, Th HTO, (b), (c), Th HTO, (a), 1234, 1543, 2367, + 5643, + 2102, + 4321, + 2121, + 4212, + 3120, Th HTO, (1), Th HTO, (d), Th HTO, (e), 344, 4141, 5087, 521, 232, + 1512, + 1032, 16, 400, Th HTO, (a), Th HTO, (b), Th HTO, (c), |122, 2133, 1221, + 3113, + 4224, + 1431, 1454, + 2121, + 3456, + 1200, + 3110, +, 1002, wer, 3.