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Tuesday, September 29, 2009

Central Tendence

Today we have about four ways of doing math for you to understand. They are called mean, median, mode, and range. First lets talk about them in order.

Mean is something that you add all the numbers that are shown on the paper or board and then you divide by the number given'. For example if you have 1,5, 10, 8, 4, 14, 9. You will have to add them all up and then divide by the number there are.

Median is going to tell you what number is in the middle. When you are doing median you will have to put them from least to greatest. For example 1, 5, 10, 8, 4, 14, 9. You will have to put them from least to greatest and find the number in the middle.

Mode is the number that appears the most. For an example 1, 5, 5, 2, 10, 5, are your numbers. Find the number that appears the most.

Range is the number that you will add the highest and the lowest number together and then divide by 2. For example if you have 21, 3, 6, 22 then you will have to add 22 and 3 together and then divide.

I also have a new way to do math and it is called Stem and Leaf. It is like you have two sides for you to put the numbers in and you will have to put the number that is in the tens place on the left side and put the ones on the right side.

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