1 9/10, 1 7/10, blank, 1 3/10, 1 1/10 what is the blank

1 5/10 or 1 1/2

Step-by-step explanation:

You seem to have an arithmetic sequence, with each term 2/10 less than the one before.

2/10 less than 1 7/10 is 1 5/10. The fraction can be reduced to 1 1/2, but you may not want to.

Answer:15/10

Step-by-step explanation:

You subtract the top of the fraction by 2