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• Các căn bậc hai của 25 là

Câu 1:

Các căn bậc hai của 25 là

A.

5

B.

-5

C.

+5 và -5

Feedback Các căn bậc hai của 25 là +5 và -5D.

625

Những câu hỏi này đến từ bài kiểm tra này. Bạn có muốn thực hiện bài kiểm tra thử không?

Trắc nghiệm Toán Học lớp 9 - Căn bậc hai. Căn bậc ba - Đề số 2

• 20 phút
• 10 câu hỏi

Làm bài kiểm tra

Một số câu hỏi từ cùng một bài kiểm tra

• $\sqrt[]{6-2x}$ có nghĩa khi

• Giá trị của x để $\sqrt{x}=$12 là:

• Căn bậc hai số học của 9 là:

• Căn bậc hai số học của 9 là:

• Biểu thức $\sqrt{\frac{-3}{x-1}}$ có nghĩa khi

• Cho biểu thức sau.

  

• Kết quả biểu thức $\sqrt{9-4\sqrt{5}}$ là:

• Căn bậc hai số học của 9 là:

• Các căn bậc hai của 25 là

• Góc tạo bởi đường thẳng y = x + 2 và trục Ox có số đo là

Một số câu hỏi khác bạn có thể quan tâm

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks from 23 to 27.

  In the early twentieth century, an American woman named Emily Post wrote a book on etiquette. This book explained the proper behavior Americans should follow in many different social (23)______, from birthday parties to funerals. But in modern society, it is not simply to know the proper rules for behavior in your own country. It is necessary for people (24)______ work or travel abroad to understand the rules of etiquette in other cultures as well. Cultural (25)______ can be found in such simple processes as giving or receiving a gift. In Western cultures, a gift can be given to the receiver with relatively little ceremony. When a gift is offered, the receiver usually takes the gift and expresses his or her thanks. (26)______, in some Asian countries, the act of gift-giving may appear confusing to Westerners. In Chinese culture, both the giver and receiver understand that the receiver will typically refuse to take the gift several times before he or she finally accepts it. In addition, to (27)______ respect for the receiver, it is common in several Asian cultures to use both hands when offering a gift to another person.Điền vào ô 23.

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks from 23 to 27.

  In the early twentieth century, an American woman named Emily Post wrote a book on etiquette. This book explained the proper behavior Americans should follow in many different social (23)______, from birthday parties to funerals. But in modern society, it is not simply to know the proper rules for behavior in your own country. It is necessary for people (24)______ work or travel abroad to understand the rules of etiquette in other cultures as well. Cultural (25)______ can be found in such simple processes as giving or receiving a gift. In Western cultures, a gift can be given to the receiver with relatively little ceremony. When a gift is offered, the receiver usually takes the gift and expresses his or her thanks. (26)______, in some Asian countries, the act of gift-giving may appear confusing to Westerners. In Chinese culture, both the giver and receiver understand that the receiver will typically refuse to take the gift several times before he or she finally accepts it. In addition, to (27)______ respect for the receiver, it is common in several Asian cultures to use both hands when offering a gift to another person.Điền vào ô 24.

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks from 23 to 27.

  In the early twentieth century, an American woman named Emily Post wrote a book on etiquette. This book explained the proper behavior Americans should follow in many different social (23)______, from birthday parties to funerals. But in modern society, it is not simply to know the proper rules for behavior in your own country. It is necessary for people (24)______ work or travel abroad to understand the rules of etiquette in other cultures as well. Cultural (25)______ can be found in such simple processes as giving or receiving a gift. In Western cultures, a gift can be given to the receiver with relatively little ceremony. When a gift is offered, the receiver usually takes the gift and expresses his or her thanks. (26)______, in some Asian countries, the act of gift-giving may appear confusing to Westerners. In Chinese culture, both the giver and receiver understand that the receiver will typically refuse to take the gift several times before he or she finally accepts it. In addition, to (27)______ respect for the receiver, it is common in several Asian cultures to use both hands when offering a gift to another person.Điền vào ô 25.

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks from 23 to 27.

  In the early twentieth century, an American woman named Emily Post wrote a book on etiquette. This book explained the proper behavior Americans should follow in many different social (23)______, from birthday parties to funerals. But in modern society, it is not simply to know the proper rules for behavior in your own country. It is necessary for people (24)______ work or travel abroad to understand the rules of etiquette in other cultures as well. Cultural (25)______ can be found in such simple processes as giving or receiving a gift. In Western cultures, a gift can be given to the receiver with relatively little ceremony. When a gift is offered, the receiver usually takes the gift and expresses his or her thanks. (26)______, in some Asian countries, the act of gift-giving may appear confusing to Westerners. In Chinese culture, both the giver and receiver understand that the receiver will typically refuse to take the gift several times before he or she finally accepts it. In addition, to (27)______ respect for the receiver, it is common in several Asian cultures to use both hands when offering a gift to another person.Điền vào ô 26.

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks from 23 to 27.

  In the early twentieth century, an American woman named Emily Post wrote a book on etiquette. This book explained the proper behavior Americans should follow in many different social (23)______, from birthday parties to funerals. But in modern society, it is not simply to know the proper rules for behavior in your own country. It is necessary for people (24)______ work or travel abroad to understand the rules of etiquette in other cultures as well. Cultural (25)______ can be found in such simple processes as giving or receiving a gift. In Western cultures, a gift can be given to the receiver with relatively little ceremony. When a gift is offered, the receiver usually takes the gift and expresses his or her thanks. (26)______, in some Asian countries, the act of gift-giving may appear confusing to Westerners. In Chinese culture, both the giver and receiver understand that the receiver will typically refuse to take the gift several times before he or she finally accepts it. In addition, to (27)______ respect for the receiver, it is common in several Asian cultures to use both hands when offering a gift to another person.Điền vào ô 27.

• Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect answer to each of the questions from 28 to 34.

  Different cultures follow their own special customs when a child's baby teeth fall out. In Korea, for example, they have the custom of throwing lost teeth up on the roof of a house. According to tradition, a magpie will come and take the tooth. Later, the magpie will return with a new tooth for the child.

  In other Asian countries, such as Japan and Vietnam, children follow a similar tradition of throwing their lost teeth onto the roofs of houses. Birds aren't the only animals thought to take lost teeth. In Mexico and Spain, tradition says a mouse takes a lost tooth and leaves some money. However, in Mongolia, dogs are responsible for taking teeth away. Dogs are highly respected in Mongolian culture and are considered guardian angels of the people. Tradition says that the new tooth will grow good and strong if the baby tooth is fed to a guardian angel. Accordingly, parents in Mongolia will put their child's lost tooth in a piece of meat and feed it to a dog. The idea of giving lost teeth to an angel or fairy is also a tradition in the West. Many children in Western countries count on the Tooth Fairy to leave money or presents in exchange for a tooth. The exact origins of the Tooth Fairy are a mystery, although the story probably began in England or Ireland centuries ago. According to tradition, a child puts a lost tooth under his or her pillow before going to bed. In the wee hours, while the child is sleeping, the Tooth Fairy takes the tooth and leaves something else under the pillow. In France, the Tooth Fairy leaves a small gift. In the United States, however, the Tooth Fairy usually leaves money. These days, the rate is $1 to $5 per tooth, adding up to a lot of money from the Tooth Fairy!What is the passage mainly about?