## 04 March, 2010

### Week in Review for 03/0310

What we have been taking in Maths this week:

This week, we have been looking at Mode, Mean, Median and Range which are different kinds of average.

Mode is the most often number, if you look at the mode you will find that M and O stands for most and often.

Mean is really mean, because you have to add up all the numbers and then divide it by the number of numbers. For example you have 1, 2, 5, 5, 6, 6, 6, 10, 11; you add them up then divide them by 9 because there are 9 numbers. This is how average is usually worked out.

Median is the middle number, if you have an odd number of numbers it is only the middle after they are put in order. For example 1, 2, 3,3, 6, the three here is the median because there are five numbers. Median is not just the middle, if you have an even number, the two middle numbers added up to make the total, then it is divided by two then you get your answer.

On the other hand Range is simple because if you have 1, 2, 3, 6, 9, 10, the range will be 9. As 10 is the biggest number and 1 is the smallest number thus 10-1 equals 9.

We have been also using Mathletics. In Mathletics you get to play games like Tutpup. If you get high score you earn credits, credits are like money where you can buy stuff. You ca. also earn weekly points if you are the winner of the week. Congratulations to Isaac H from America, he is the winner of this week.

I think we should continue using Mathletics and any other websites to do with Maths. This makes us more challenged and gives us an urge to learn Maths and be better.

Thanks A!