Hi Stephanie,

The volume of a box is the length times the width times the height which is how I think you found the volume to be

\[10 \times 6 \times 4 = 240 \mbox{ cubic inches.}\]

A half inch cube is 1/2 inch by 1/2 inch by 1/2 inch so its volume is

\[\frac12 \times \frac12 \times \frac12 = \frac18 \mbox{ cubic inches.}\]

Hence it takes 8 half inch cubes to fill 1 cubic inch and hence $8 \times 240$ half inch cubes to fill 240 cubic inches.

Penny