Giusto did not attend any educational establishments but was taught at home by his father. Ernesto Bellavitis gave his son a good appreciation and liking for mathematics but before long Giusto had greatly exceeded his father's knowledge of the subject.
Giusto hindi dumalo sa anumang pang-edukasyon establishments ngunit ay tinuturuan sa tahanan sa pamamagitan ng kanyang ama. Ernesto Bellavitis ibinigay ng kanyang anak na lalaki ng isang magandang appreciation at lasa para sa matematika ngunit bago mahaba Giusto had malaki lumampas sa kanyang ama sa kaalaman ng ang paksa.