1. r) 1 3/4 : 3/3

1. Convert mixed number to improper fraction: 1 3/4 = 7/4.
2. Simplify the second fraction: 3/3 = 1.
3. Divide the fractions: 7/4 : 1 = 7/4.
4. Convert back to a mixed number: 7/4 = 1 3/4.