Subtract the largest data with lowest data
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subtract the biggest # from the lowest. If you the numbers 10, 18, 2, and 20, to find the range you would do this: 20-2=18. So the range would be 18.
To find mean: add all the numbers and divide by the amount of numbers. To find medium: put the numbers in order and find the middle value. If there are two, add them and divide by two. To find mode: find the number that appears most often. To find range: subtract the lowest number from the highest number.
Range.
Take the smallest value and subtract it from the largest value and that is the range.
The opposite of add is subtract.