22 is halfway between 19 and 25 because 19+3=22, and 22+3=25.
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It is: 30
10
The number halfway between 0.2 and 0.3 is calculated by finding the average of the two numbers. In this case, the average of 0.2 and 0.3 is (0.2 + 0.3) / 2 = 0.25. Therefore, the number halfway between 0.2 and 0.3 is 0.25.
It is 27.5, the number halfway between the two middle numbers.
The number halfway between 15 and 25 can be found by taking the average of the two numbers. To calculate this, add 15 and 25 together to get 40, then divide by 2 to get 20. Therefore, the number halfway between 15 and 25 is 20.