1. Zero on top, another # on bottom
   1. 0/7
   2. Zero is the numerator and another number is the denominator
      

      Item	The REAL question	Item
      0 / 7 = ?	? + 7 = 0	only 0

2. Zero on bottom, another # on top
   1. 7/0
   2. Zero is the denominator and another number is the numerator
      

      Item	The REAL question	Item
      7/0 = ?	? + 0 = 7	no ℜ exists, undefined

3. Zero on both top and bottom
   1. 0/0
   2. Zero is both the denominator and the numerator
      

      Item	The REAL question	Item
      0 / 0 = ?	? + 0 = 0	all ℜ work, indeterminate

Practice Items

1. 0/19
2. 0/-5
3. -5/0
4. 0/0
5. 19/0
6. 7-4+3-6 / 0