Missteaks

(a) Observe that

If the notation confuses you, I would say it as “4 and  4/3 equals 4 times 4/3.”  Are there other examples like this (that use integers)? Can you find them all?

(b) Here’s another…

(c) …and another:

(cancel the 6’s). Find all examples using 2-digit numbers. (We believe that there are 4.) Use teams of 4 and see which team finds them all first. Some organization pays off.

(d) This one is uber interesting:

Are these the start of a progression?