Unit2-Amazing numbers- Section 4-同步练2025-2026学年沪教版八年级英语上册

Unit 2 Amazing numbers Section 4 同步练 班级：________ 姓名：________ 得分：________ 一、选词填空（共 10 小题，每小题 1 分，满分 10 分） 从方框中选择合适的词或短语，并用其正确形式填空，每词限用一次。 tally stick, symbol, system, exactly, represent, abstract, spread, develop, appear, pattern 1. In ancient times, people used a ____________ to count animals or rice. 2. The Roman numeral "V" ____________ the number 5. 3. We do not know ____________ how the first counting systems were created. 4. Arabic numerals ____________ to Europe thanks to Arab traders. 5. Fibonacci numbers often ____________ in nature, like flower petals and pine cones. 6. The Fibonacci sequence follows a clear ____________: each number is the sum of the two previous ones. 7. People later created ____________ symbols to represent numbers instead of tally sticks. 8. Different cultures have different numeral ____________, like Chinese, Roman, and Arabic. 9. The "X" in Roman numerals is a ____________ for the number 10. 10. Over time, people ____________ faster ways to write large numbers. 二、词形转换（共 10 小题，每小题 1 分，满分 10 分） 根据句子意思，用括号中所给单词的适当形式填空。 1. The ____________ (develop) of counting systems changed how people recorded information. 2. The Fibonacci sequence ____________ (appear) in many natural patterns. 3. Each tally stick ____________ (represent) one thing to count. 4. We use Arabic numerals because they are ____________ (convenient) than Roman numerals. 5. The Roman alphabet was used ____________ (write) numbers in Europe long ago. 6. The Fibonacci sequence ____________ (grow) very quickly as numbers get larger. 7. The counting system ____________ (spread) to other parts of the world after it was created. 8. We don’t know ____________ (exact) how tally sticks turned into abstract symbols. 9. The pine cone’s spirals ____________ (show) the Fibonacci pattern clearly. 10. Ancient people used tally sticks ____________ (count) animals and food. 三、阅读理解 A（共 4 小题，每小题 2 分，满分 8 分） 阅读短文，选择最佳答案。 The Story of Numbers and Fibonacci Numbers have a long and interesting history. In ancient times, people used tally sticks to count things like animals or rice. Each stick stood for one item, but writing large numbers took a long time. Later, abstract symbols were created in ancient India. These symbols became known as Arabic numerals after spreading through the Arab world to Europe. Roman numerals were once common in Europe, but they are not used as much today because they are hard to write. Fibonacci numbers are another amazing part of math. The Fibonacci sequence, created by an Italian mathematician, is a pattern where each number is the sum of the two previous ones. For example, 1, 1, 2, 3, 5, 8, and so on. These numbers appear everywhere in nature: flower petals, pine cone spirals, and sunflower seeds all follow this pattern. Scientists still don’t know why, but Fibonacci numbers help us understand the natural world better. 1. What was the earliest counting method mentioned in the passage? A. Arabic numerals B. Roman numerals C. Tally sticks D. Fibonacci sequence 2. Where were abstract number symbols first created? A. Ancient India B. Ancient Rome C. Ancient China D. Europe 3. Why are Roman numerals not as common today? A. They are too easy to use. B. They are hard to write. C. They look boring. D. They don’t represent numbers correctly. 4. What is true about the Fibonacci sequence? A. Each number is the difference of the two previous ones. B. It only appears in man-made things. C. It grows very slowly. D. It is a pattern found in nature. 四、完形填空（共 10 小题，每小题 1 分，满分 10 分） 阅读短文，从 A、B、C、D 四个选项中选择最佳答案。 Numbers are everywhere, but how did they develop? In ancient times, people used tally sticks to count things. Each stick 1____________ one item, but writing large numbers took too long. Later, people in ancient India created abstract 2____________ for numbers. These symbols spread through the Arab world to Europe and became known as 3____________ numerals. Roman numerals were also used in Europe, but they are not common today because they are 4____________ to use. Fibonacci numbers are an amazing mathematical 5____________. The sequence starts with 1, 1, and each number is the 6____________ of the two previous ones. These numbers appear in many 7____________ things: flower petals, pine cone spirals, and sunflower seeds all follow this pattern. Scientists believe this pattern helps plants grow efficiently, but no one knows for sure why it is so common. Understanding the history of numbers and patterns like Fibonacci’s helps us see how math connects to 8____________. From tally sticks to modern numerals, numbers have 9____________ the way we record, understand, and interact with the world. They truly make our lives easier and help us unlock the 10____________ of nature. 1. A. represented B. wrote C. counted D. grew 2. A. tally sticks B. symbols C. numerals D. patterns 3. A. Roman B. Chinese C. Arabic D. Indian 4. A. easy B. hard C. fun D. quick 5. A. pattern B. game C. problem D. tool 6. A. difference B. sum C. product D. division 7. A. man-made B. natural C. simple D. small 8. A. science B. nature C. history D. art 9. A. changed B. kept C. stayed D. developed 10. A. problems B. secrets C. patterns D. rules 五、五选四（共 4 小题，每小题 2 分，满分 8 分） 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。 Numbers have come a long way since ancient times. 1____________. They used tally sticks, where each stick stood for one item. This worked for small numbers but was slow for large ones. Later, abstract symbols were created in India. 2____________. These symbols spread through the Arab world to Europe, becoming known as Arabic numerals. Roman numerals were also used in Europe, but they are not as common today because they are hard to write. Fibonacci numbers are another amazing part of math. 3____________. Each number is the sum of the two previous ones, and this pattern appears everywhere in nature, like flower petals and pine cones. 4____________. Numbers truly connect us to both history and the natural world. A. They later became popular around the world B. At first, people used simple counting methods C. It is a sequence found in many natural patterns D. They are only used in ancient buildings today E. These numbers help us understand how math works in nature 参考答案 一、选词填空 1. tally stick 2. represents 3. exactly 4. spread 5. appear 6. pattern 7. abstract 8. systems 9. symbol 10. developed 二、词形转换 1. development 2. appears 3. represents 4. more convenient 5. to write 6. grows 7. spread 8. exactly 9. show 10. to count 三、阅读理解 A 1. C 2. A 3. B 4. D 四、完形填空 1. A 2. B 3. C 4. B 5. A 6. B 7. B 8. B 9. A 10. B 五、五选四 1. B 2. A 3. C 4. E 学科网（北京）股份有限公司 $