## Monday, October 18, 2010

### Justin's Sesame Street Video Post

Our Math group was Justin and Nicholas

Ratio:

2 term ratio: Compares 2 quantities measured in the same units.
Example: 5:9

3 term ratio: Compares 3 quantities measured in the same units.
Example: 3:5:9

Part to part ratio: Compares different parts of the group to each other.
Example: 7:5

Part to whole ratio: Compares 1 part of the group to the whole group.
Example: 9:30

Rate:Compares two quantities measured in different units.
Example: 72 beats/ min

Unit rate: A rate in which the send term is 1.
Example: 20 km an hour

Unit price: A unit used when shopping, often shown per 100g or per 100ml, makes it easier for shoppers to compare costs of similar items.
Example: \$2.19/100g

Proportional Reasoning:A relationship that says two ratios or two rates are equal, can be written in fraction form.
Example: 10 erasers cost \$2, how much will 20 erasers cost?
set up:
_________=__________
Here is a link to the video that we chose to do, its about the letter R.

Here is our remake of the video