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The associative property of addition: 19 + 11 + 37 = (19 + 11) + 37 = 30 + 37 = 67 19 + 11 + 37 = 19 + (11 + 37) = 19 + 48 = 67
11 * 19 = 209
17.2727
19
11 + (19 + 6) = 36(11 + 19) + 6 = 36So they are both equal. The brackets make no difference in this case.