About John Zalewski Expertise I can help you solve problems involving fractions, decimals, ratios, and algebra. I can teach you how to do math faster, and even in your head. I can teach math definitions, and help you study, if necessary. Please do not ask any graphing, trigonometry, or calculus questions. Try to work through homework questions before asking for assistance.
Experience I routinely process numbers of all kinds in my head, without need of a calculator.
Education/Credentials I was an A math student while in high school.
The 'median' is the middle number in a group of numbers. For example, suppose you had the numbers 4, 24, 99, 102, 5, 32, and 44.
The first step is to write the numbers in order, high to low, or low to high, it doesn't matter.
4, 5, 24, 32, 44, 99, 102
Next, cross off one number on each side, alternating from side to side.
First, the 4 is crossed off, then the 102, 5, 99, 24, and finally, the 44.
This leaves you with the 32, which is the median for this group of numbers.
If you have an even amount of numbers, say 2, 4, 6, 8, then you're left with two numbers, 4 and 6, after you cross out the 2 and 8. You obviously cannot cross out both 4 and 6, so, to find the median, you need to take the average of these two numbers. The average of 4 and 6 is 5 (4+6)/2, so the median for this group of numbers is 5.
