2, 30 coins, consisting of 2 cents and 5 cents, * * * worth 9.99 cents. How many coins are there in each?
3. 100 steamed buns 100 monks, three for each big monk and one for each young monk. How many monks are there?
The head teacher took 50 students from Class Two, Grade Five to plant trees. Teacher Zhang planted 5 trees, a boy planted 3 trees and a girl planted 2 trees, a total of 120 trees. How many boys are there? How many girls?
5. There are 65,438+000 teachers and students greening the campus. Each teacher plants 3 trees, and each student plants 1 tree, making a total of 100 trees. How many trees do teachers and students plant?
6. Handling 100 glass bottles requires 3 points for handling a glass bottle and 5 points for breaking a glass bottle. The freight after delivery is 2.60 yuan. How many glass bottles were broken during handling?
7. A math contest was held in a primary school. *** 15 questions, 8 points for each correct question, 4 points for each wrong question, and 72 points for Xiao Ming * * *. How many questions did he answer correctly?
8. Chickens and rabbits * * * have 100 feet. If the chicken is replaced by a rabbit and the rabbit is replaced by a chicken, * * * has 92 feet. How many chickens and rabbits are there?
9.80 Chinese books and 100 math books have the same total price. It is known that each Chinese book is 5 points more expensive than each math book. What is the unit price of Chinese books and math books?
10, three students from Qingfeng Primary School took part in a math contest with *** 10 questions. If they answer a question correctly, they will get 10, and if they answer a question incorrectly, they will be deducted 3 points. All three students answered all the questions. The scores are 87, 74 and 9 respectively. They answered several questions correctly.
1 1. Chickens and rabbits live in the same cage. Rabbits are less than chickens15,282 feet. Q: How many chickens and rabbits are there?
12. Chickens and rabbits live in the same cage. Rabbits are more than chickens15,228 feet. Q: How many chickens and rabbits are there?
13, a crab has 10 feet; Dragonflies have six feet and two pairs of wings; Mantis has six feet and a pair of wings. There are 37 crabs, dragonflies and mantises, with 250 feet and 52 pairs of wings. How many crabs, dragonflies and mantises are there?
14. A highway with a length of 2 136 meters was built by two engineering teams, A and B. First, Team A built it at a speed of 30 meters per day for several days, and then Team B continued to repair it, with a daily maintenance of 42 meters. It took the two teams 60 days to complete the road. Q: How many days did each team repair it?
15. I bought 65 cards from 2 yuan, 3 yuan and 5 yuan and spent them in 240 yuan. It is known that there are twice as many pictures in 5 yuan as in 2 yuan. How many pictures did I buy?
16, male and female monkeys ***38, picking 266 peaches every day. It is known that a male monkey picks 10 peaches every day, a female monkey picks 8 peaches every day and a young monkey picks 5 peaches every day. It is also known that there are four fewer male monkeys than female monkeys. Q: How many little monkeys are there?
17. It is said that a bird with nine heads and one tail has a bird in Kyubi no Youko with Kyubi no Youko. There are 580 birds with 900 tails. How many birds are there in each bird?