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Question
In a quiz competition, Team A scored +30, −20, 0 and team B scored −20, 0, +30 in three successive rounds. Which team will win? Can we say that we can add integers in any order?
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Solution
Total score of team A
= [(+30) + (−20)] + 0
= (+10) + 0
= 10
Total score of team B
= [(−20) + 0] + (+30)
= −20 + 30
= +10
Score of team A = Score of team B.
Yes, we say that we can add integers in any order.
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