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  1. Prime numbers (video) | Khan Academy

    Prime numbers are numbers that have only 2 factors: 1 and themselves. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. By contrast, numbers with more than 2 factors are call …

  2. Khan Academy | Khan Academy

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  3. Prime factorization (video) | Khan Academy

    This video explains the concept of prime numbers and how to find the prime factorization of a number using a factorization tree. It also shows how to write the prime factorization using …

  4. Standards Mapping - Virginia Math | Khan Academy

    Compare (using symbols <, >, =) and order (least to greatest and greatest to least) a set of no more than four decimals and fractions (proper, improper) and/or mixed numbers using multiple …

  5. Factors and multiples | Khan Academy

    In this unit, you will learn about factors and multiples and apply your understanding of the area of a triangle. You will determine if a number between 1 and 100 is prime or composite.

  6. Standards Mapping - Common Core Math | Khan Academy

    Determine whether a given whole number in the range 1–100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1–100 is prime or composite.

  7. Factors and multiples | Pre-algebra | Math | Khan Academy

    Understanding and finding factors and multiples. After these videos, you'll be ready for fractions.

  8. Proof: If p divides a^2, p divides a (video) | Khan Academy

    This video will help you: • Understand how prime numbers behave in algebraic expressions • Master an important theorem often used in number theory and factorisation problems • …

  9. Standards Mapping - Florida B.E.S.T. Math | Khan Academy

    Given a mathematical or real-world context, write an equation involving multiplication or division to determine the unknown whole number with the unknown in any position.

  10. Factors, multiples, and patterns | Khan Academy

    In this unit, we'll play with numbers, breaking them into pairs called factors. We'll meet special numbers called prime and composite. Plus, we'll make cool patterns with shapes and numbers.