To determine how many almonds Pete grabbed from the 18 mixed nuts, you can use the fraction \( \frac{2}{9} \) to express the number of almonds. The number of almonds can be calculated as follows:
\[ \text{Number of almonds} = \text{Total nuts} \times \text{Fraction of almonds} \]
So, the equation becomes:
\[ \text{Number of almonds} = 18 \times \frac{2}{9} \]
Calculating this gives:
\[ 18 \times \frac{2}{9} = 4 \]
Therefore, the correct equation from your options that shows how to determine the number of almonds Pete grabbed is:
18 times \( \frac{2}{9} \) = 4.