Sometimes when you are adding a 1-digit number to a 3-digit number you have to bridge a ten. Bridging a 10 just means crossing over to the next ten. This happens when the ones add up to more than 9.

The call line received 3.6 million calls, chats and texts in 2021, and that number is expected to double in the first full year after the 988 transition, according to SAMHSA.