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4th grade math

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What is an expanded algorithm? Son doesn't know and didn't bring home his textbook, any ideas?

  • 4th grade math - ,

    Check these sites.

  • 4th grade math - ,

    Usually used with multiplication, creating an expanded algorithm is taking a formula and "drawing it out," or making it longer (and thus more simplified) by "un-distributing" it. For example:

    Expand (a+b)n.

    Answer: an + bn

    Why: In the problem, n should be distributed to both a and b using the Distributive Property of Multiplication.

    Example #2:

    Expand (2+4+9)10.

    Answer: 20+40+90, or 150

    Why: See above.

    Hope this helps!

  • 4th grade math - ,

    I can't understand a word.

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