Verify the following using suitable properties.
(a) (-23) + [(-41) + (-9)] = [(-23) + (-41)] + (-9)
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Jack’s scores in five successive rounds are: 25, -5, -10, 15 and 10.
Total marks got by Jack = 25 + (-5) + (-10) + 15 + 10
= 25 – 5 – 10 + 15 + 10
= 25 – 15 + 25 = 35
Thus, 35 marks are got by Jack in a quiz.
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