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trieu180820003
2 năm trước
một người đem một thúng trứng ra chợ bán, buổi sáng bán đc 3/5 số trứng trong thúng, buổi chiều bán đc số trứng giảm đi 2 lần so vs buổi sáng. trong thúng còn lại 6 quả trứng. người đó đã đem bán ? quả trứng.
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II. Read the following text and decide whether each sentence is True (T) or False (F). SECONDARY SCHOOL Secondary school in Vietnam lasts for four years of school (between sixth and ninth grade) and finishes at the age of 15. According to the General Statistics Office of Vietnam, about 5.14 million lower-secondary students were in 10,321 lower-secondary schools. Subjects studied are Vietnamese, mathematics, biology, physics, chemistry, history, geography, civics, foreign language, physical education, technology, art, and music. Optional subjects include class activities and school activities, vocational-oriented activities (three periods per month in grade nine), and extracurricular activities (four periods per month in all grades). In secondary school, students are expected, as in most other systems, to sit a variety of regular tests and exams. These include simple tests, evaluatory exams, and entrance exams to further education. There is a 15-minute test every week and a 45-minute test every 2 months. It’s writing down everything they have crammed into their short-term memory over the last week - under time pressure. There are four main evaluatory exams during every grade and they are the same as at the tests, but a little more significant. After students have completed four years of secondary school, they will graduate, have to take high school entrance exams, and choose a course of study in high school; these include specialized secondary education, vocational secondary education, professional secondary education, and professional training. 1. Secondary school in Vietnam lasts for five years. 2. There are many subjects taught in secondary school. 3. There is a 45-minute test twice a month. 4. There are 4 main evaluatory exams during every grade. 5. Students don’t have to take the entrance exam to high school. giúp mik với

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