Verified Answer :

It's already rounded to the nearest tenth, so it's still the same.

Answer: 20

Explanation:  20
                      | |
                      |  \
                Tens   \
                   Single

15.5 + 4.5  = 200
15.5 -  5.5  = 100
              |  
              |
What is the lowest number (Not including +/- sign before it)

Answer: 1st one/4.5

Final answer (what you put on paper): 20

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