You add the two numbers, and divide the result by 2.
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0.27+0.75=1.02/2=0.51
The halfway number between 10,000 and 11,000 can be calculated by finding the average of the two numbers. Add 10,000 and 11,000 together to get 21,000, then divide by 2 to find the average. Therefore, the halfway number is 10,500.
The number 8 is halfway between 5 and 11. It is 3 more than 5 and 3 less than 11. To find a halfway point (which is also the average), add the numbers together and divide by 2.
List the numbers in numerical order. You are looking for the middle number. In this case it will be the number halfway between the 4th and 5th number. Add the 4th and 5th numbers and divide them by 2, or find the number exactly halfway between the 4th and 5th numbers. So if your 4th number was 12 and your 5th number was 16, then the value halfway between them or the number that is half of the value when you add the two together is 14. That is the median.
You need two numbers to find something halfway between them.