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It means that if you change the grouping (parentheses) of a multiplication problem, you will still get the same answer. Ex. (3 x 2) x 4 = 24 and 3 x (2 x 4) = 24. You changed the location of the parentheses, but the product always remains 12.
Suppose you have a coupon for $5 off, followed by a 25% discount. You would use PEMDAS to evaluate .75(x - 5) (parentheses followed by multiplication). I am a tournament Scrabble player, so I would use PEMDAS while keeping score. Suppose I play QUIXOTE (as a bingo) on a triple word with Q being doubled. Then my score for the word would be 3(2(10) + 1 + 1 + 8 + 1 + 1 + 1) + 50 Use the order of operations here: = 3(33) + 50 = 149 points.
Another word is but
yes the word jump is a word because a verb is an action word.