Seminar 1. Number systems -- Seminar 2. Divisibility and order in the integers -- Seminar 3. GCDs and the division algorithm -- Seminar 4. Prime numbers and factorization into primes -- Seminar 5. Applications of prime power factorization -- Seminar 6. Modular arithmetic and divisibility tests -- Seminar 7. More modular arithmetic -- Seminar 8. The arithmetic of fractions -- Seminar 9. Properties of multiplication of fractions -- Seminar 10. Addition of fractions -- Seminar 11. The decimal expansion of a fraction -- Seminar 12. Order and the number line.
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