Bulding Fractions Conceptual Understanding

What is the difference of these fractions?

$$1\frac{3}{8}\ -\ \frac{1}{3}\ =\$$

At a farm, $$\frac{2}{9}$$ of the total area is covered by a pumpkin patch and $$\frac{1}{7}$$ of the total area is covered by a cornfield.

What fraction of the total area of the farm is covered by the pumpkin patch and the cornfield combined?

Tina measures the lengths, in inches, of 10 insects. She records the lengths of the insects on the line plot shown.

What is the total length, in inches, of the 3 longest insects?

Ten runners participated in a marathon. The line plot shows the number of bottles of water each runner drank during the marathon.

What is the T O T A L number of bottles of water the runners drank?