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Algebra Difficulty 4.1 AIME Find the answer South Africa
Calculate 2015−(2015−(2015−(2015−1))).
A number or a short expression. Spacing and $ signs are ignored.
Solution
2015−(2015−(2015−(2015−1)))=2015−(2015−(2015−2014))=2015−(2015−1)=2015−2014=1.
Alternatively,
2015−(2015−(2015−(2015−1)))=2015−2015+2015−2015+1=1.
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