15
20
It is: 50
40
-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
15
35
20
It is: 15
The number halfway between 18 and 22 can be found by taking the average of the two numbers. Adding 18 and 22 together gives us 40, and dividing by 2 gives us 20. Therefore, the number halfway between 18 and 22 is 20.
It is: 50
17
-5
the number between 2 and 20 is 11
It is: (20+80)/2 = 50
40
30