Надо правильно перевести текст : ученик 3 класса участвовал в городской олимпиаде по . в олимпиаде участвовало 37 учеников с разных школ. он занял 1 место. его наградили грамотой.

The pupil 3 classes participated in the olympiad in match.The competition was attended by 37 students from different schools.He took 1st place.He was awarded diploma.

Disciple 3 class participated in the city competition in mathematics. The competition involved 37 students from different schools. He took 1st place. He was awarded a diploma.