The earth has about 80 times the mass of the earth's moon. the gravitational force exerted on the moon by the earth has what relation to the gravitational force exerted on the earth by the moon?

The gravitational forces between two objects are always equal

and in opposite directions.

The gravitational force exerted on the moon by the earth is equal to

the gravitational force exerted on the earth by the moon.

Your weight on the Earth is equal to the Earth's weight on you.