1, chickens and rabbits live in the same cage, with 20 heads and 62 feet. How many chickens and rabbits are there?
Chicken and rabbit live in the same cage, with 35 heads and 94 feet. How many heads do chickens and rabbits have?
In a parking lot, 32 cars and motorcycles are parked. Among them, cars have four wheels and motorcycles have three wheels. These cars have 108 wheels. How many cars and motorcycles are there?
Xiaohua bought 34 commemorative stamps of 2 yuan and 5 yuan and spent money on 98 yuan. How many commemorative stamps of two yuan and five yuan did Qiu Xiaohua buy?
6. Forty-six people in the class went boating, and * * took a 12 boat, including 5 people in the big boat and 3 people in the small boat. How many big boats and small boats are there?
7. Aunt Zhang keeps 200 chickens and rabbits. The number of chickens and rabbits is ***560. How many chickens and rabbits are there?
8, cranes and turtles in the same pool, cranes are more than turtles 12, cranes and turtles have 72 feet. How many cranes and turtles are there?
9. Xiao just bought eight stamps and four stamps *** 100, and * * * paid them to 6.8 yuan. By the way, how many stamps did Xiaogang buy back? How much do you pay each other?
10, three students from Dongfeng Primary School participated in the math competition. There were 10 questions in a test paper, and they got 10 points for answering one question correctly. Not only did they fail to score because they answered a wrong question, but they were also deducted 3 points. All three students answered correctly. Xiaoming scored 74 points, Xiaohua scored 22 points and Xiaohong scored 87 points. They were three.
1 1. knowledge contest, 10 true or false questions, scoring rules: 2 points for each correct answer and 1 point for each wrong answer. Xiao Ming answered all the questions, but in the end he only got 14. How many questions did he answer wrong?
12. A convoy transported 500 cases of thermos bottles for the supermarket, each with 6 thermos bottles. It is known that the freight for each 10 thermos bottle is 5 yuan. A damaged 10 yuan, and the transportation team will get 1.350 yuan after delivery and settlement. Q, * * * How many thermos bottles were damaged?
Spiders have eight legs, dragonflies have six legs and two pairs of wings, and cicadas have six legs and 1 pairs of wings. At present, these three species have 16 bugs, * * * have 1 18 legs and 14 pairs of wings. Q: How many birds are there in each species?
14, crab has 10 legs, mantis has 6 legs and 1 pair of wings, dragonfly has 6 legs and 2 pairs of wings. Now these three animals have 37, 250 legs and 52 pairs of wings. How many animals are there in each kind?
On 15, Xiaodong's mother got back the bonus 400 yuan from the company, including 80 for 2 yuan, 80 for 5 yuan and 80 for 10 RMB * *, and the same for 5 yuan and 10 RMB. How many pieces of each of these three kinds of RMB?
16, Xiaohua has 38 coins of 1, 2, 5 cents, a total of 90 cents and 2 cents. It is known that the number of coins in 1 is equal to the number of coins in 2 cents. How many coins are there in each of these three coins?
17. A math contest has ***20 questions. The grading standard is: 5 points for each question, and 1 point for each question. Xiaohua took part in the competition and got 64 points. Q: How many questions did Xiaohua get right?
18 chickens and rabbits * * * have 100 feet. If the chicken is replaced by a rabbit and the rabbit is replaced by a chicken, * * * has 86 feet. Q: How many chickens and rabbits are there?
19. The cargo ship has a load of 260 tons and a volume of 1000 m3. Now it is carrying two kinds of goods, A and B. It is known that the volume of A is 8 m3 per ton and the volume of B is 2 m3 per ton. How many tons should A and B be loaded separately to make full use of the load and volume of this ship?
20. The cross-country cycling race is 220km long and divided into 20 segments, one of which is 14km and the other is 9km. How many sections are 9 kilometers long?
2 1. There are a group of chickens and rabbits. The total number of legs is twice that of the head. There are 18 rabbits. How many rabbits are there?
22. If the multiplicand is increased by 15, the product is increased by180 when the multiplier is unchanged; If the multiplicand remains the same and the multiplier increases by 4, the product increases by 120. What is the original product of multiplying two numbers?
23. How many numbers does it take to compile the page number of a 695-page story book? How many numbers are used in the number "5"?
24. It takes 6889 numbers to compile a dictionary. How many pages does this dictionary have?
If Party A and Party B shoot and hit, Party A will get 4 points and Party B will get 5 points; If not, Party A will deduct 2 points and Party B will deduct 3 points. Each person will shoot 10, and * * * will hit 14. When the score was settled, Party A scored 10 more than Party B. How many rounds did Party A and Party B win?
26. A math exam ***20 questions, you get 5 points for doing one right, 1 point for doing one wrong, and 0 point for not doing it. Xiaohua got 76 points in the exam. How many questions did he get right?