Unit, Denominator, and Part

Wednesday 12/3/08

Do-now: Review of definitions


  1. The thing being split up into parts is called the             .

  2. The number that says how many parts each is split into is called the             .

  3. In the picture below...



    a) What is being split up into parts?
    (This is the unit)


    b) How many parts is each unit split into?
    (This is the denominator)


    c) What are the parts called?



    d) In English: A          of a          is a         .

    e) In math symbols:     

  4. In the picture below...



    a) What is being split up into parts?
    (This is the unit)


    b) How many parts is each unit split into?
    (This is the denominator)


    c) What are the parts called?



    d) In English: A          of          is         .

    e) In math symbols:     

Writing fractional part relationships in math

For each line of this table, figure out what is the unit, the denominator, and the part, and then write in math the relationship shown by the picture or English sentence. Remember, to figure out which is which, you can ask yourself...
ExampleUnitDenom.Part1/denom. unit = part
A quarter of a gallon is a quart.gallon4quart1/4 gallon = quart
40581/5·40 = 8
turp3korr1/3 turp = korr
Nine is one fifth of forty five.
I can break up a yard into three feet.
One sixteenth of a pound is an ounce.
I can break up 30 into five sections of 6.
A pace is a third of a reed.