What is the difference between the estimated and real value of 55-21?

The difference between the estimate and the real value of 55-21 is that when you estimate you're giving an educated guess and the real value is when you're actually doing the work to prove your answer and not just guess.

Step-by-step explanation:

Real Value

55-21=34

 55

- 21

 34

Estimated

55-21=32

go and ask your mom to you