Supply reasons for each of the first three steps given below. = 450 + (32+50) = 450+ (50 + 32) = (450 + 50) + 32 = 500 + 32 (450+32) +50 = %3D = 532 Choose the correct reason to the right of each step. (450+32) +50 = 450 + (32+50) = 450 + (50 + 32) = (450 + 50) + 32 %3D = 500 + 32 = 532

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