To produce the number 54 in American Sign Language (ASL), you would use finger spelling.
The signs for the numbers 5 and 4 are:
- 5: Hold up your non-dominant hand with all fingers extended, then use your dominant hand to touch the tip of your thumb to the tips of your fingers (palm facing yourself).
- 4: Hold up your non-dominant hand with all four fingers extended, then use your dominant hand to tap the tip of your thumb to the tips of the fingers (palm facing yourself).
So, to sign 54, you would sign 5 followed by 4 using finger spelling.