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Unit 1 sequences, logic, numeration systems, set theory, set operations,
            Venn diagrams
Unit 2 whole number operations, mental math, divisibility, prime numbers,
            greatest common divisors and least common multiples
Unit 3 integers, rational numbers, properties of exponents,
            ratio and proportion
Unit 4 decimals, scientific notation, percents and interest, rational and irrational numbers,
            the Pythagorean theorem, square roots and radicals, functions, linear equations,
            systems of equations