A farmer placed an order for \( 133 / 10 \) tons of fertilizer. He calculates that the corn fields will require \( 31 / 10 \) tons of it. How much fertilizer will the farmer have left for his other crops? Write your answer as a fraction or as a whole or mixed number.

To find out how much fertilizer the farmer will have left, we need to subtract the amount required for the corn fields from the total amount ordered. First, convert the fractions: \[ \frac{133}{10} - \frac{31}{10} = \frac{133 - 31}{10} = \frac{102}{10} \] Now, simplify \(\frac{102}{10}\): \[ \frac{102}{10} = \frac{51}{5} \] Now we can convert \(\frac{51}{5}\) to a mixed number: \[ \frac{51}{5} = 10 \frac{1}{5} \] So, the farmer will have \( 10 \frac{1}{5} \) tons of fertilizer left for his other crops.