5+5 = 10 10+5 = 15 15-5 = 15 10+5 = 15
5
5 10 15 10 5
-5 It is 15 more than -20 and 15 less than 10 To find a halfway point (which is also the average), add the numbers together and divide by 2. -20 + 10 = -10 and -10/2 = -5
Well, isn't that just a happy little group of numbers we have there? To find the mean average, you simply add up all the numbers and then divide by how many there are. So, for these numbers, you would add 18 + 12 + 10 + 10 + 25, which equals 75. Then, you divide 75 by 5 (since there are 5 numbers), giving you a mean average of 15. Happy calculating!
If the average is 10 then 15 is 5 above average.
12.5
It means you are counting in increments of 5. 5+5=10, 10+5=15. If by the word "mean", you are talking about the average, then the mean is 10. To determine the average of any group of numbers, add the numbers and divide the total by the number of numbers added - (does this makes sense?) Example: 5 + 10 + 15 = 30. Divide 30 by 3 (you added 3 numbers together to get the total) and the average is 10. Hope this helps.
15. 5 - -10 = 5 + 10 = 15 → 15 + -10 = 15 - 10 = 5
5+5 = 10 10+5 = 15 15-5 = 15 10+5 = 15
7+7+7+14+15=50 50/5=10 Your answer is 10.
5 6 7 10 4 15 12
5
5 + 10 = 15. To take the average, add all the units to be averaged, then divide that number by the number of units, in this case, 2. So, 15/2 = 7-1/2 or simply, 7.5.
Three pairs of numbers with a GCF of 5 are: 5 and 10, 10 and 15, and 5 and 15.
-10
2/3 + 3/5 =10/15 + 9/15= 19/15(19/15) / 2 = 19/3019/30