When will the power war end

1. How to improve the ability of mathematical calculation

first, the improvement of the ability of calculation requires the study of hard theories and rules.
the correct operation must be based on a thorough understanding of calculation theory. The calculation theory in students' mind is clear and the rules are firmly remembered. When doing four calculation problems, it can be carried out in an orderly way. There are two mistakes in integer multiplication, 25 times 3 equals 95, 24 times 5 equals 100, which typically reflects that students do not have a thorough understanding of multiplication theory in the process of learning arithmetic, and how to deal with the number of multiplication carry is relatively vague. Furthermore, divisor is a decimal division in the two wrong cases (1). 44 divided by 1. 8 equals 8, 11. 2 divided by 0.05 equal to 22.4) also shows that the students' understanding of the law is not deep enough
to understand the meaning of the order and operation law, the operation order refers to the operation of the same level from left to right. In the formula without brackets, if there are addition, subtraction, multiplication and division, multiplication and division should be calculated first, then addition and subtraction; If you have brackets, you should first count the ones in the brackets, and then count the ones in the brackets. Primary school textbooks mainly talk about the law of exchange and combination of addition, and a property of subtraction: "subtracting the sum of two numbers from a number is equal to subtracting two addends from the number in turn." And the commutative law, associative law and distributive law of multiplication. These laws are applicable to the operation of integers, decimals and fractions at the same time, and are widely used. In the two wrong examples [327 - (27 + 75) = 375, 87 times 2 divided by 87 times 2 = 1], both show the students' wrong understanding of the calculation law and the operation law< Second, the improvement of computing power needs to pass, understand and master basic knowledge. In order to get the calculation results, students should first consider what mathematical concepts, operation laws, operation properties, operation rules and calculation formulas to use. Therefore, fully understanding and mastering these basic knowledge determines whether they have the ability of calculation. For example, if students want to have the ability to calculate four items of scores, they must first understand the meaning and nature of scores, understand and master the basic knowledge and corresponding basic skills such as general score, approximate score, the interaction between score and false score. Only when the relevant basic knowledge is explained clearly and the students really master it, the students will not make mistakes in calculation. Compared with the lower grades, the basic knowledge of the higher grades is more abundant. Therefore, we must not rush for success in teaching. We should help students start from sorting out the basic knowledge they have learned, use the transfer, and continue to deepen. For example, when teaching the addition of fractions with different denominators, first ask the students to answer the meaning of addition, and they will know that it is the operation of combining two numbers (or more numbers) into one number. Next, let the students observe and find that the fractions with different denominators and the units of fractions are different, and they can't add directly. After understanding this, they can guide the students to use the knowledge of general division to "turn differences into similarities", So the problem is transformed into the addition of fractions with the same denominator< Third, the improvement of calculation ability needs excellent oral calculation ability.

the new curriculum standard points out: "the basic and developmental nature of mathematics should be highlighted in the compulsory ecation stage." As for the ability of oral calculation, it is the basis of learning mathematics, and the level of oral calculation ability has an extremely important impact on students' basic calculation ability; The training of oral arithmetic is helpful to cultivate students' keen observation; It is helpful to cultivate students' comprehensive thinking ability; It is helpful to cultivate students' quick reaction ability; It is helpful to the cultivation of students' innovative consciousness. How to train the ability of oral arithmetic is an important subject worthy of discussion and research. Teaching practice tells us that it is very necessary to train students' oral arithmetic ability, and we should pay enough attention to it< Fourth, the improvement of computing ability needs to cultivate students' good computing habits.

to improve students' computing ability, we must pay attention to the cultivation of good computing habits< Make students form the habit of proofreading carefully

2. Students are required to see each data and operation symbol clearly, determine the operation order, and choose a reasonable operation method

3. Make students form the habit of careful calculation and standardized writing. Students are required to write neatly, with correct format, correct handwriting, no scribble, no alteration, and keep their homework neat and beautiful< 4. Make students form the habit of estimation and self-conscious checking. Give them the method of checking calculation and estimation, and take checking calculation as an important part of the calculation process to carry out strict requirements, advocating the use of estimation to check the correctness of the answers

5. Make students form the habit of mutual inspection. When a problem has been initially calculated, it can't be calculated completely. It's inevitable for students to make some mistakes in calculation, which requires students to check carefully

6. Be good at drafting.

2. If the tablet computer crashes, black screen, unable to enter the system after restoring the factory settings, it is recommended to try the operation:
1. Restart the machine: press the power key + volume key at the same time for 7-15 seconds to restart; Early machine long press the power button for more than 7-10 seconds to restart the device
2. If you still can't use the machine, it may be that there is a problem with the equipment system or hardware. For further confirmation, it is recommended that you bring the purchase invoice and Three Guarantees certificate to send the machine to the local Samsung after-sales service center for testing
the address information / customer service telephone number of Samsung service center can be inquired through the following methods: please log in to the official website of Samsung - click the after-sales service in the upper right corner - click to find the Samsung Service Center - select the proct you want to inquire about and the province or city you are in to search
tip: if you don't have a service center in your city, please contact the after-sales service center in the surrounding city first and ask if it can be detected and repaired by mail or express.

3. The September 18th Incident began with the invasion of Poland by Nazi Germany in 1939 and ended with the outbreak of the Second World War. On September 2, 1945, Japan signed the letter of surrender for almost 14 years.

4. The Korean War is a war of national and national unity between the DPRK and the ROK, and it is also the embodiment of the hegemony struggle between the US and the Soviet Union on the Korean Peninsula. The United States, the Soviet Union and China were involved in the war to varying degrees. The war began on June 25, 1950 when the Korean army invaded South Korea. On July 27, 1953, the Korean Peninsula military armistice agreement was signed. Because there is no peace agreement, "technically speaking," the war is still not over, and North Korea and the United Nations are still at war. In addition to South and North Korea, the main participants included the Chinese people's Volunteer Army and the United States, as well as 15 countries including Britain, Canada, Australia, New Zealand, the Netherlands, France, Turkey, Thailand, the Philippines, Greece, Belgium, Colombia, Ethiopia, South Africa and lucerneburg, which sent small-scale troops to participate in the war according to the resolutions of the United Nations. The air force units and anti-aircraft artillery units of the Soviet air force participated in the air defense operations in the Korean War<

Five Middle East wars
the so-called "Middle East War" refers to the large-scale war between Arab countries and Israel in the Middle East region from 1948 to 1982, which is the longest lasting war after the Second World War. Arab countries refer to the countries with the majority of Arab nations, mainly distributed in Asia and the Middle East in northern Africa. Israel is a state founded by Jews. The dispute between the Arab world and Israel has a long history. Historically, both the Arab and Jewish nations have established states in the Palestinian area (located between the Mediterranean Sea, the dead sea and the Jordan River). In the 30th century BC, the Canaanites who were originally in the Arabian Peninsula moved to the coastal and plain areas of Palestine to settle down. In the 13th century BC, the Hebrews, the ancestors of the Jews, conquered the Canaanites and established the Hebrew kingdom in Palestine. Since then, Palestine has been conquered by Persian Empire, Greece, Rome, Turkey and other foreign nations, and Jews have been forced to exile all over the world. At the end of the 19th century, the Zionist movement rose and advocated the return of Jews scattered all over the world to Palestine and the establishment of a Jewish dominated state. When Britain occupied Palestine in 1917, there were 660000 Arabs and only 90000 Jews in this area. However, in order to control the Palestinian area and the Suez River, Britain and the United States strongly supported the Zionist movement. Under their planning, a large number of Jews who had settled all over the world moved to Palestine. Since then, the contradiction between the Arab and Israeli nationalities has been deepening and bloodshed has been taking place. On November 29, 1947, the United Nations General Assembly under the control of the United States and Britain adopted a resolution, which decided to establish an Arab state and a Jewish state in Palestine respectively. Jerusalem was divided by the two countries. The Arab world widely opposed the resolution, did not establish an Arab state, and firmly opposed the establishment of a Jewish state. On May 14, 1948, the Jews announced the establishment of the state of Israel in the Palestinian area. On May 15, the Arab countries had the first Middle East war with Israel. As a result, the Arab countries lost. Egypt, Jordan, Syria and Lebanon signed armistice agreements with Israel. After the end of the war, many problems remained, which graally triggered the second, third, fourth and Fifth Middle East wars. It was not until 1989 that the "Palestinian state" was finally established, and the Middle East issue, especially the issue of Palestinian statehood, came to an end

Vietnam War Vietnam War (1961 ~1975), for short: Vietnam War, also known as: the second Indochina war, now the Vietnamese government calls it: the war of resistance against America (Vietnam: Chiế); n Tranh Chố ng Mỹ Cứ u Nư&# 7899; c) It was the war between the new democratic Democratic Republic of Vietnam (North Vietnam) and the "southern national liberation front of Vietnam" (the so-called Communist Party of Vietnam) against the United States and its puppet regime, the Republic of Vietnam (South Vietnam). The Vietnam War is the war with the largest number of participants and the most significant influence of the United States after World War II, and it is also a war in which the United States lost completely (although the United States government claimed to be a "glorious retreat"). The Vietnam War is a "hot war" in the cold war. With the support of Ho Chi Minh, the leader of North Vietnam, the "National Liberation Front", which hopes to unify Vietnam, opposes the Wu Tingyan government of South Vietnam. The United States sent troops to help South Vietnam. The first American president to support South Vietnam was Dwight D. Eisenhower; John Fitzgerald Kennedy began to support the war in Vietnam; Lyndon Johnson expanded the war. During the period of Richard Milhous Nixon's administration, the United States graally withdrew its general from Vietnam e to the domestic anti war tide. The North Vietnamese army and the South Vietnamese Communist army finally defeated the army of the South Vietnamese government and unified the whole territory of Vietnam< The British occupied the West Island in 1832 and the East Island the following year. Since then, there have been many negotiations between Britain and Argentina on the sovereignty of the Falklands. In 1982, the negotiations between the two sides broke down and the war broke out. The war lasted 74 days from April 2 when Argentina sent troops to occupy the Falklands to June 14 when it was recaptured by Britain< From April 2 to June 14, 1982, the war between Britain and Argentina on the Falklands lasted for 74 days. The war, which was not officially declared, was called "armed conflict" by diplomats and "Falklands war" by militarists. It was the first modern war in the 20th century< The Iran Iraq war, also known as the first Persian Gulf War, is an eight year border war between Iran and Iraq. The war broke out on September 22, 1980 and ended on August 20, 1988. The two countries are adjacent, with a common border of 1200 kilometers. The Arabian River, about 100 kilometers long, is the natural border in the south of the two countries. For a long time, there have been border disputes and armed conflicts between the two countries. In addition, religion is also an important reason for the outbreak of the Iran Iraq war<

the Gulf War
the Gulf War was a war between January 17 and February 28, 1991, in which the United States led multinational alliance, under the authorization of the United Nations Security Council, fought against Iraq to restore the territorial integrity of Kuwait
the Gulf, short for the Persian Gulf, is located in the middle of Western Asia. The countries around the Gulf are the main oil procing areas in the world, with a prominent strategic position. In August 1990, the Gulf War, the largest local war in the world after the war, broke out in this area. This war has had a profound impact on the establishment of the new international order after the cold war. At the same time, the new situation and new characteristics of operations under the condition of modern high technology, which it shows, have brought a lot of enlightenment to military strategy, campaign tactics and military construction< During the Kosovo war from March 24, 1999 to June 10, 1999, under the pressure of the United States and NATO, the representatives of the ethnic minorities of Serbia and Kosovo held peace talks in rambouyee near Paris on February 6, 1999. The negotiation was based on the plan drafted by us special envoy hill
the main contents of the program are: respect for the territorial integrity of the Federal Republic of Yugoslavia, a high degree of autonomy for Kosovo, withdrawal of the federal army of Yugoslavia from Kosovo, disarmament of the "Kosovo Liberation Army", formation of a new police force according to the proportion of the local population to maintain law and order, and NATO sending multinational forces to Kosovo to ensure the implementation of the agreement
this plan is difficult for both sides to accept. The ethnic minorities insist on independence and are unwilling to disarm. The Federal Republic of Yugoslavia does not agree that Kosovo will be an autonomous republic and opposes the entry of NATO forces into Kosovo. However, the U.S. and NATO, who presided over the negotiations, said that 80% of the contents of the plan should not be changed and must be accepted, otherwise the party who refuses will be punished, and for the fry, it will be attacked by NATO militarily. After the negotiations reached an impasse, the meeting was once suspended and resumed on March 15. The representatives of the ethnic minority signed the agreement on March 18, but the Serb side still refused to sign it. On March 19, NATO issued an ultimatum to the south alliance. On March 24, NATO launched an air strike against Yugoslavia, and the Kosovo war broke out
under the great pressure of NATO air strikes, after mediation by Russia, Finland and other countries, fry finally softened its position. On June 2, fry president Milosevic accepted the peace agreement jointly formulated by Russian envoy chernomyrkin, Finnish President Ahtisaari and US Deputy Secretary of state Talbot, While adhering to the basic content of the original Rambouillet plan, the agreement emphasizes the necessity of solving the problem through the UN Mechanism and makes specific provisions on it. According to the agreement, the Multinational Force stationed in Kosovo will be established in accordance with the spirit of the UN Charter, the exact nature of Kosovo's future self-government status will be decided by the UN Security Council, and the arrangements for refugees to return home will also be implemented under the supervision of the UN High Commissioner for Refugees< On June 3, the parliament of the Republic of Serbia of the Federal Republic of Yugoslavia adopted a resolution to accept the above agreement. On June 9, NATO representatives and representatives of Serbia signed a specific arrangement agreement on the withdrawal of the fry troops from Kosovo in Macedonia, and the fry troops immediately began to withdraw from Kosovo. On June 10, NATO officially announced the suspension of air strikes against the fry. On the same day, the UN Security Council adopted a resolution on the political settlement of the Kosovo issue by 14 votes in favor and 1 abstention (China). The Kosovo war, which lasted two and a half months, came to an end<

the beginning of the Iraq war from March 20, 2002 to April 15, 2002. From March 20 (Iraqi time), the United States and the United Kingdom launched large-scale air strikes and ground offensives codenamed "operation beheading" and "operation deterrence" against Iraq. After the war, Bush delivered a television address to the whole country, announcing the beginning of the war to overthrow Saddam Hussein's regime, stressing that the war would be "a quick battle and a quick decision". At this stage, the US British coalition forces successively dropped more than 2000 precision guided bombs, including 500 Tomahawk cruise missiles, at more than 10 cities and ports, including Baghdad, Basra, Najaf, Mosul, Kirkuk and umm Qasr. At the same time, Saddam also made a speech to the whole country, calling on the Iraqi people to fight against American aggression and defeat the US British coalition forces
the Stalemate Stage of the war. Because of the long supply line and Iraqi resistance, the goal of "quick war and quick decision" of the US British coalition forces was not achieved, and the ground attack was once blocked. The Iraqi army launched fierce battles with the United States and Britain in Karbala, Sheila, hindiya and other places in central Iraq. At the same time, hundreds of Iraqis return to Iraq from Jordan and other countries every day to join the ranks of the United States and the British coalition forces
the turning stage of the war. Relying on its air superiority and mechanized forces, the United States and Britain launched a powerful offensive in several ways, successively captured Basra and other important cities and strategic areas in southern Iraq, and formed a encirclement of Baghdad, thus making the war one-sided. On April 8, U.S. forces advanced to Baghdad from the north and south, and seized the Rashid military airport southeast of Baghdad. American tanks moved into Baghdad and occupied the city of Saddam Hussein. In the face of the U.S. military's long march into Baghdad and Tikrit, the Iraqi leader called on the army and people to take the "die together" attack against the U.S. and British coalition forces
at the end of the war. On April 15, the U.S. military announced that the main military operations in the Iraq war had ended and that the coalition forces "had controlled the whole territory of Iraq.". According to the official announcement of the United States, the war in Iraq

5. When the screen of note9 is closed, the information such as time / notice will be displayed. If you need to turn on / off this function, you can go to mobile phone settings - lock screen - alarm screen, and slide the right button to turn it on / off.

6. World War II was launched by German Prime Minister Hitler. It was launched on September 1, 1939 to attack Poland, and then the world war broke out. The end date of World War II was September 2, 1945, when Japan declared its surrender.

7. The hundred regiments war lasted more than five months from the beginning of the attack on August 20, 1940 to the end of the anti "mopping up" campaign on January 24, 1941. The Eighth Route Army dispatched 105 regiments to launch a standardized campaign against the Zhengtai railway and other transportation lines and strongholds along the line occupied by the Japanese northern front army.

8. The first World War ended in November 1918< The World War II ended in August 1945.

10. The clone wars will start at 8:00 a.m. on March 30,
didn't say when it will end
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