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Why is mathematics called a cumulative subject?

AIt needs many books
BEach skill builds on basics
CIt is always taught late
DIt has no new ideas
Answer & Solution
Correct answer: B. Each skill builds on basics
1. Processes build on each other. 2. Mastering an advanced skill needs many basic skills. 3. So gaps in basics cause later errors. _Source: Wikipedia, Dyscalculia, Diagnosis_
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