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Q: What is the average of these 3 numbers -18 -23 plus 20?

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18 + 24 + 18 = 60/3 = 20 The average of the three numbers is therefore 20.

16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238

For any set of numbers n-1, n, and n+1, the average will be n. For example, if the numbers are 18, 19, 20, the average will be 19.

To find the mean average of 20 numbers requires the 20 number to be added together which will take 19 additions and then divide by the number of numbers which will take 1 division → 19 additions followed by 1 division, a total of 20 operations are nominally needed to find the mean average of 20 numbers.

20+18+13+9=60

24 + 18 + 20 + 22 = 84

To find the average you need to add the two numbers together and divide by two. 18 + 22 = 40 40 / 2 = 20 The answer is 20.

12 + 16 + 18 + 20 + 9 = 75

18 + 10 + 20 + 30 + 15 + 50= 143

12 + 24 * 6/18 = 12 + 24 *1/3 = 12 + 8 = 20

2 times -20 equals 40 and 2 plus -20 equals -18

18 plus 20 is 38 how could you not know that,it is such an easy question

32+14+20+18+16+31+21+16=168

109 you can plus like this: (19+1)+20+20+(1+1+18)+4+25

It is (18+20+22)/3 = 20

13 plus -8 = 5 ... and -18 plus -2 = -20.

2 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 106

The average of these three numbers is 20.

The average of 18 and 22 is 18+22/2 = 20

The answer is 156. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.

18 + 2 = 20

9 plus 11 (20) plus 15 (35) plus 18 is equal to 53

The answer is 209. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.

21

2 + 18 = 20