Mathematical+Reflections,+p.+15+0910

​ A.S Dec 21, 2009
 * Big idea: Many important practical and mathematical applications involve comparing quantities of one kind or another; it is important to know witch method to use and how we should use them**

**What methods are there for comparing quantities?** Another type of comparison is a part to whole type ratio.
 * Essential Question:**
 * 1. Give another example of each type of comparison listed above.**

In a difference comparison you get the exact number but a ratio gives a simplified number. A ratio doesn't show the exact number but a simplified number. So the data in a way is inaccurate but a difference comparison give accurate data and is possible in figuring out the total number of people in lets a survey or vote. Ratio is not the best way of getting information when you're required to get the exact information**.** Ratio is helpful for simplifying some information when having to make an add based on large number.
 * 2. What information do you get from ratio comparison that you don't get from a difference comparison.**

Summary:

In this investigation 1 I learned how to make differences in many ways. I learned how to make differences by ratios, difference comparison and graphs. I also learned what types of comparisons are better than the other. Like difference comparison is better than a ratio comparison.