 
<translate> Ụmụ klas nke ise kụrụ osisi 30 x 2 = 60. Ugboro atọ nke osisi ụmụ klas nke ise kụrụ bụ 60 x 3 = 180. Ya mere, ụmụ klas nke isii kụrụ osisi 180 - 30 = 150. N'ihi ya, ha kụrụ mkpokọta osisi 30 + 60 + 150 = 240. Azịza ikpeazụ ya bụ: 240. <eng> The 5th graders planted 30 x 2 = 60 trees. Thrice the number of trees planted by the 5th graders is 60 x 3 = 180. So, the 6th graders planted 180 - 30 = 150 trees. Therefore, they planted a total of 30 + 60 + 150 = 240 trees. The final answer: 240. 