Dividing Whole Numbers, Part 2: Partial Quotients and Multiples of Ten
This clip explains how understanding and learning powers of ten and learning multiples of ten can reduce the number of partial quotients needed to solve a division problem.
Prime Numbers: Prime and Composite Numbers
This clip explains the difference between prime numbers and composite numbers. It also talks about how the Greeks figured out which numbers are primes and which are not.
Adding Fractions with Different Denominators: Finding Common Denominators and Multiples
This clip explains the role of multiples in finding common denominators. It also clarifies the difference between multiples and denominators, noting that "numbers have multiplesÂ…fractions have denominators".
Adding Fractions with Different Denominators: Finding the Least Common Multiple
This clip explains the use of prime factorization in finding the least common multiple.
Adding Fractions with Different Denominators: Least Common Multiple, The
This clip explains that using the least common multiple (which is another way of saying the smallest common multiple) as the common denominator is the simplest way to add fractions.
Adding Fractions with Different Denominators: Summary: Adding Fractions with Different Denominators
This clip reviews the topic of adding fractions with different denominators. It explores three ways this can be done, including writing the multiples of each denominator until a common multiple is found; multiplying the original denominators; and fi...
Adding Fractions with Different Denominators: Shortcut for Common Denominators, A
This clip explains a very simple rule: To add two fractions with different denominators, simply multiply through the first fraction by the denominator of the second, and multiply through the second fraction by the denominator of the first. This will...