1, Method 1: Equation method.
Suppose there are x chickens and y rabbits.
So we got 23 chickens and 12 rabbits.
2. Method 2: Hypothesis method.
(1) Suppose the cage is full of chickens, * * * is 35×2=70 feet, but it is actually 94 feet, and * * * is 94-70=24 feet short. Since each rabbit is regarded as a chicken with short feet, the number of rabbits is 24 ÷ 2 = 65438+.
(2) If the cage is full of rabbits, then * * * is 35×4= 140 feet, which is much more than the actual situation 140-94=46 feet. Each rabbit has two extra feet, so there are 46 chickens = 23, and there are 35-23 rabbits.
3. Method 3: Leg cutting method.
Suppose the chicken and the rabbit both cut off one leg, and there are 38- 14=24 legs standing, and then cut off the other leg. At this time, the chicken sat on the ground and the rabbit stood on two feet. At this time, there are still 24- 14= 10 legs standing, and these 10 legs are rabbits, so there are 10÷2=5 rabbits and 14-5=9 chickens.
Skills of doing math problems:
1, read the exam and solve the problem clearly.
Some candidates do not pay enough attention to the examination of questions, are eager to achieve success, and rush to write, so that they do not fully understand the conditions and requirements of questions. As for how to dig hidden conditions from the problem and stimulate the thinking of solving the problem, it is even more impossible to talk about it, so there are naturally many mistakes in solving the problem. Only by patiently and carefully examining the questions and accurately grasping the keywords and quantity in the questions.
2. Use it quickly and accurately.
Only "accuracy" can score, and only "accuracy" can save you the time of examination, while "quickness" is the result of usual training, not a problem that can be solved in the examination room. If you are quick, you will only make mistakes in the end.
3. The relationship between "doing" and "scoring".
To turn your problem-solving strategy into a success point, it mainly depends on accurate and complete mathematical language expression, which is often ignored by some candidates. Therefore, there are a lot of "yes but no" and "yes but incomplete" situations on the test paper, and the candidates' own evaluation scores are far from the actual scores.
4. The relationship between difficult questions and easy questions.
When we get the test paper, we should browse the whole volume. Generally speaking, we should answer in the order from easy to difficult, from simple to complex. Because seemingly easy questions will also have the level of "biting hands", seemingly difficult questions will also have points. Therefore, when you see the "easy" questions in the exam, you should not take them lightly.