2. Students in Grade Three and Grade Four collected 65 kilograms of tree species, while students in Grade Three collected 6 bags of 5 kilograms each. How many kilograms did they collect in grade four?
3. The TV factory produced 274 TV sets in the morning and 196 TV sets in the afternoon. If 5 10 TV sets were produced on the third day, how many TV sets were produced on the first day compared with the second day?
4. The classroom needs to buy 48 sets of desks and chairs. The teacher went to the mall with 400 yuan's money. He selected each set of tables and chairs with 9 yuan money. Did he bring enough money?
5. The library * * has 1200 books, which are placed on three shelves on average, and each shelf has four floors. How many books are there on average on each floor?
6. A chicken can lay an egg every day. Grandma Wang keeps 15 hens and 5 cocks.
How many eggs can you lay a week?
7. The students took four buses to visit the exhibition, with an average of 45 people in each bus. Before leaving, I added 56 classmates. How many people went there?
8. I bought 4000 Jin of flour, ate some, and left three bags of 25 Jin each. How many kilograms did you eat?
9、
The school bought 8 boxes of books, each with 80 books, which were distributed to 5 grades on average. How many books are distributed in each grade?
10, the weight of walnuts purchased by the agricultural and sideline products purchasing station is twice that of jujube, 480 kilograms of jujube, and how many kilograms of walnut kernel jujube?