## Friday, October 29, 2010

### Chelsea's Sesame Street Video

Group Members:

Chelsea - The one who has no idea what a proportion is
Anabelle - The teacher who has to teach her what a proportion is
Trisha - Camera Person

Definitions:

Two-term ratio - compares 2 quantities measured in the same units
- eg. A:B, 7:13

Three-term ratio - compares 3 quantities measured in the same units
- eg. A:B:C, apples:bananas:oranges

Part to part ratio - compares different parts of a group to eachother
-eg. black tiles to red tiles: 5:13

Part to Whole Ratio - compares one part of a group to the whole group
- eg. black tiles to total tiles: 5:20

Rate - compares 2 quantities measured in different units

Unit rate - a rate in which the second term is one

Unit price - a unit rate used when shopping.
-eg. \$0.50/can

Proportion - a relationship that says the two ratios or two rates are equal.
-eg. How much will 1 dozen erase cost if 3 erasers cost \$0.75?
(multiply by 3)
2/3 = 6/9

Original Video : Cookie Monster in the Library