To improve

To improve her handwriting Paula practices writing the numbers 1 to 200 in words. How many times will she have written the word "one" in all?

Correct answer:

n =  118

Step-by-step explanation:

$$\begin{gathered} n_1=9 \\ {n}_2=100+n_1=100+9=109 \\ n=n_1+n_2=9+109=118 \end{gathered}$$

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