Joke Collection Website - Bulletin headlines - The sixth grade students took part in the "Welcome to the Asian Games" tree planting activity. Among them, class one planted 80 plants and class two planted 9 8 plants.

The sixth grade students took part in the "Welcome to the Asian Games" tree planting activity. Among them, class one planted 80 plants and class two planted 9 8 plants.

80× 9 8 × 7 9 +7,

=70+7,

=77 (tree);

Class Three planted 77 trees.

So the answer is: 77.