May I get some help please? (questions highlighted in blue)

Answer:
Step-by-step explanation:
10. 4 1/2 divided by 3/4 = 6
11. 3 2/3 divided by 2/3 = 11/2
12. 2 3/8 divide by 1/4 = 9 1/2 so no because he only has 9.5
13.a) 5 1/2 divided by 3/4 = 22/3 so no
13.b)11/20