Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided. 1.
Write it out
You can also check a math problem by writing everything out on paper. 2. Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.
3.
Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.
Plugging in
You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (变量). 4. This is the only real way to assure yourself that the answer you’ve found is correct.
Check for a reasonable answer
5. For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas (公式) and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.
A．Do the opposite
B．Correct the answers
C．Therefore you’ll improve your grades, as well as your math skills.
D．Plug the variable in the equation (方程) to check it out.
E. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.
F. It also helps you to figure out everything after you have already finished the test.
G. This helps you to know what information you have and what information you need to solve.
Certain animals know without analysis the difference between a number of objects and a smaller number. In his book The Natural History of Selbourne (1786), the naturalist Gilbert White tells how he surreptitiously removed one egg a day from a kind of bird Plover’s nest, and how the mother laid another egg each day to make up for the missing one. He notes that other kinds of birds ignore the loss of a single egg, but if more than one egg has been removed, they will give up their nests. It has also been noted that a certain type of bees always provides five—never four, never six—caterpillars (毛虫) for each of their eggs so that their young have something to eat when the eggs have hatched out. Research has also shown that both mice and pigeons can be taught to distinguish between odd (奇数) and even (偶数) numbers of food pieces.
These have led some people to think that creatures can actually count. They also point to dogs that have been taught to respond to questions about numbers with the correct number of barks.
Animals respond to quantities only when they are connected to survive as in the case of the eggs, or survive as in the case of food. They can “count” only when the objects are present and only when the numbers involved are small—no more than seven or eight. In lab experiments, animals which are trained to count one kind of objects were unable to count any other type. What interests them are the objects, not the numbers. Animals’ achievements simply are not equal to evidence of counting. They only show the results of clever, careful training.
1.The author refers to Gilbert’s book in paragraph 1 in order to_______.
A．support the idea that animals can count
B．show attitudes have changed since 1786
C．prove that some animals are aware of quantities
D．indicate that more research is needed in this field
2.The author mentions all of the following are aware of quantities in some way EXCEPT _______.
A．caterpillars B．bees
C．mice D．plovers
3.The underlined word “surreptitiously” probably means _______.
A．quickly B．carefully
C．occasionally D．secretly
4.Where does this text probably come from?
A．A news report. B．A science fiction.
C．A park guide. D．A biology magazine.
Visit New York City with your kids where there are numerous things to do which will entertain their spirits and feed their minds.
●The Whispering Gallery
Make your way to the Whispering Gallery. Kids can get a lot of fun there. Once inside the gallery, place one person facing the corner at one end of the room and then place another person facing the corner at the opposite end. Ask one of them to whisper a phrase or a quick sentence and the person at the opposite end will be able to hear every word that was said.
E.42nd St. New York, NY 10017
212-771-5322
grandcentralterminal.com
●American Museum of Natural History
The American Museum of Natural History was founded in 1869. In addition to its impressive exhibits, permanent attractions bring the cool feeling to kids. They can enter the Fossil Halls and take in the impressive dinosaur skeletons. And the Milstein Hall of Ocean Life educates kids on the fragility (脆弱) of the ocean.
Central Park West at 79th St. New York, NY 10024
212-769-5606
amnh.org
●The Scholastic Store
Most parents want their children to read, and moreover, to enjoy reading. The Scholastic Store helps to make that wish a reality by publishing well-written stories that appeal to children, such as Clifford the Big Red Dog, the Magic School Bus and Harry Potter, the Scholastic Store will delight your children.
557 Broadway. New York, NY 10012
212-343-6100
scholastic.com
●Ellen’s Stardust Diner
The restaurant is a place where each person in your family can find something to eat. A diverse menu will satisfy every one’s appetite. Arugula salads, grilled cheese burgers and meatloaf are all on this varied menu. The hall of beauty queens, a drive-in theatre can add to the unique dining experience.
1650 Broadway, corner of 51st St. New York, NY 10019
212-956-5151
ellensstardustdiner.com
1.In addition to your favorite food in Ellen’s Stardust Diner, you can also ________.
A．make some good friends B．meet many beautiful queens
C．receive the first-class service D．enjoy some entertaining programs
2.Which of the following websites helps kids learn about ancient animals?
A．ellensstardustdiner.com B．grandcentralterminal.com
C．amnh.org D．scholastic.com
3.The author has written this text probably for ________.
A．children B．parents C．educators D．teachers
A jobless man applied for the position of "office boy" at Microsoft．The HR manager interviewed him and then watched him cleaning the floor as a test．"You are employed," he said．"Give me your e-mail address and I’ll send you the application to fill in, as well as the date when you may start." The man replied, "But I don't have a computer, neither an e-mail." "I'm sorry," said the HR manager．"If you don't have an email, that means you do not exist. And who doesn’t exist cannot have the job．"
The man left with no hope at all．He didn't know what to do, with only ten dollars in his pocket．He then decided to go to the supermarket and buy 10 kg tomatoes．He then sold the tomatoes from door to door．In less than two hours, he succeeded to double his capital (资金). He repeated the operation three times, and returned home happily with 60 dollars．
The man realized that he could survive in this way, and started to go every day earlier, and return later．Thus, his money doubled or tripled every day．Shortly, he bought a cart, then a truck, and then he had his own fleet (车队) of delivery vehicles．Five years later, the man was one of the biggest food retailers (零售商) in the US.
He started to plan his family's future and decided to have a life insurance．He called an insurance broker and chose a protection plan．When the conversation was concluded, the broker asked him his e-mail．The man replied, "I don't have an e-mail．"The broker said curiously, "You don't have an e-mail, and yet have succeeded to build an empire．Can you imagine what you could have been if you had an e-mail?" The man thought for a while and replied, "Yes, I'd be an office boy at Microsoft !"
1.According to the passage, which of the following is TRUE?
A．The man was one of the biggest food retailers in the world
B．The man didn't give up though he failed the interview
C．He started his career by selling tomatoes in the supermarket
D．Those who have e-mails can work at Microsoft．
2.The underlined word "tripled" in paragraph 3 can be replaced by ____
A．became large B．became 3 times
C．decreased slightly D．decreased quickly
3.The man can be described as ____．
A．helpful and considerate B．positive and generous
C．smart and hardworking D．nervous and unselfish
4.Which proverb can best describe the story?
A．Misfortune may be an actual blessing．
B．Where there is a will, there is a way．
C．Accidents will happen
D．No pains, no gains
Eco City Farms are becoming more popular in cities and towns around the Unites States.
Eco City Farms in Edmonton, Maryland, is located near shopping centers, car repair shops and homes. The neighborhood is a working-class community. People do not have very much money. And they have limited access to fresh food in markets.
Over the past two years, the farm has attracted volunteers form the community like Marcy Clark. She schools her four children at home. On a recent day she brought them to Eco City Farms for a lesson, her son Alston Clark thinks his experience is very valuable. “I like coming out here,” he says, “You know, you connect with the earth, where your food comes from. You appreciate the food a little bit more.”
Margaret Morgan started Eco City Farms. She thinks of it as a place where people can learn to live healthier lives. “Growing food in a community brings people together, ”she continues, “Every piece of what we do here is a demonstration (范例) to show people everything about how to have an eco-friendly community.” she says. From the Eco City Farms people come to know that they are not only growing food and raising chickens and bees, but improving the soil with compost (肥料) made from food waste.
Eco City Farms is an experimental operation. The farm gets its power not from the local electricity networks, but from the sun with solar panels (板). In winter, the green house use a geothermal (地热) system.
Vegetables can be grown all year. So once a week, all winter long, neighbors like Chris Moss and her three children bike to the farm to pick up a share of the harvest.
“I like eating the vegetables” say five-year-old Owen Moss.
1.What is mainly talked about in the passage?
A．Eco City Farms save a lot of energy.
B．Eco City Farms are influencing community life.
C．Eco City Farms helps the working-class live better.
D．Eco City Farms are gaining popularity.
2.What is the author’s attitude toward Eco City Farms?
A．Enthusiastic. B．Disappointed.
C．Surprised. D．Doubtful.
3.According to the passage, Eco City Farms are close to the following places EXCEPT______.
A．shopping centers
B．car repair shops
C．fast-food restaurants
D．working-class community
4.In which of a newspaper can you most probably read this article?
A．People. B．Travel.
C．Environment. D．Education.
I was watching a TV series one night when I took in one scene. A man was seeking his community votes, and people 36 wanted to know why they should give him their 37 . He took them to his house and on every 38 in his house was the word “Faith” pasted. People raised lots of 39 to find out why the word was pasted on his mirrors. He said, “My dad often 40 me to believe that as long as you have 41 , you should have faith. Every time you look in to the mirror, you’re looking at yourself and see ‘Faith’. ”
The 42 I learned from this is simple — faith is a living thing and in the same way we’re all 43 given 24 hours a day and we’re all given the same measure of faith. Faith keeps us going when things get 44 ! Why is some people’s faith stronger than that of others? Exercise! If we choose to exercise our faith, it will 45 ; but if we choose not to, it remains weak. Some people might 46 that they don’t have faith, but we all practice faith every day even if we don’t 47 it was faith. Daily 48 , such as studying, investing or reaching for a dream, take faith.
Faith 49 hearing and doing. I made a decision yesterday — to 50 reading the newspaper full of too much sad and 51 news. Why? Because I 52 there was a drop of my mental state after reading the newspapers.
Faith, when it’s put to 53 , becomes a beautiful thing, It lifts your mental state to a higher place that 54 you to raise yourself up and declare, “Yes we can.” So make the decision today to strengthen your faith by 55 it.
1. A．mostly B．briefly C．bravely D．finally
2. A．support B．instruction C．pity D．information
3. A．wall B．mirror C．picture D．book
4. A．questions B．voices C．rules D．standards
5. A．teaches B．permits C．forces D．promises
6. A．friendship B．breath C．wealth D．success
7. A．view B．lesson C．choice D．example
8. A．extremely B．freely C．equally D．frequently
9. A．strange B．difficult C．funny D．different
10. A．stay B．return C．slow D．grow
11. A．realize B．argue C．understand D．predict
12. A．agree B．appreciate C．admire D．acknowledge
13. A．services B．steps C．tasks D．experiment
14. A．comes from B．dreams of C．feels like D．keeps on
15. A．consider B．delay C．stop D．risk
16. A．various B．genuine C．negative D．latest
17. A．heard B．noticed C．declared D．explained
18. A．check B．list C．sleep D．work
19. A．warns B．causes C．orders D．forbids
20. A．forming B．exercising C．obtaining D．thinking
