I know that ADD can start as early as childhood. I was diagnosed when I was about 16 years of age and my doctor told me that I had ADD way before I was ever diagnosed. So the answer to your question: Can ADD start at 15? Yes it can
45
15+15+15+15=60
15 add 20 = 35
We suggest to start with 15 lbs of salt and then test the water. Ideal will 3400 ppm. Usually we suggest to add 290 lbs of salt for a 10,000 gallon pool if the pool does not have any chlorine. By that reference you should add 29 lbs. But we think start with 15 lbs and increase as needed is a good idea.
7 + 15 + 28 = 50
add to 15 and subtract to 7
add 9 add 1 subtract 20 add 9 add 1
15
how much do you need to add to 15 to make it 60
Add 15 to itself. Add another 15. Keep adding 15. Multiples are multiple additions.
try punch start first...
The game started at 11:15 and lasted for 2 1/2 hours and at 1:45 it ended. It started at 11:15 and we need to add 2 1/2 hours to do a check. 11:15 plus one hour is 12:15 and add one more hour and its 1:15 so add half an hour and the 1:45 finish time is arrived at.