import re

def extract_values(sentence):
   num = r'\d*\.?\d+(?:/\d*\.?\d+)*'
   return re.findall(fr'{num}(?:\s+(?:and|to)\s+{num})*', sentence)

print(extract_values("He is 1 and 1/2 years old. He is .5 years old and he is 5 years old. He is between 9 to 11 or 9 to 9 and 1/2. He was born 11/12/20"))