The ornamental design for a mathematicaleducationaldevice, as shown and described.
FIG. 1 is a perspective view of the mathematical educational device showing
my new design, and having the lid to a storage compartment associated
therewith shown in a semi-open position;
FIG. 2 is a rear elevational view thereof with the lid shown in the
semi-open position;
FIG. 3 is a top plan view thereof with the lid shown in the closed
position;
FIG. 4 is a right side elevational view thereof with the lid shown in the
semi-open position with it being understood that the left side elevational
view will be a mirror image thereof, and;
FIG. 5 is a front elevational view thereof with the lid shown in the
semi-open position.