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Phong Thien k phải ý Hồng Phúc Nguyễn nói bn là bên này học tiếng anh, bn nên đăng sang toán....
a: =-5/7(2/11+9/11)+12/7
=12/7-5/7
=7/7=1
b: \(=\dfrac{-12}{56}+\dfrac{35}{56}-\dfrac{28}{56}=\dfrac{-5}{56}\)
c: \(=\dfrac{1}{4}-\dfrac{5}{13}+\dfrac{2}{11}-\dfrac{8}{13}+\dfrac{3}{4}\)
=1-1+2/11
=2/11
d: \(=\dfrac{21}{31}+\dfrac{-16}{7}+\dfrac{44}{53}+\dfrac{10}{31}+\dfrac{9}{53}\)
=1+1-16/7
=-2/7
e: \(=\dfrac{\dfrac{4}{36}-\dfrac{30}{36}-\dfrac{144}{36}}{\dfrac{21}{36}-\dfrac{1}{36}-\dfrac{360}{36}}=\dfrac{-160}{-340}=\dfrac{8}{17}\)
3 k lun
THÕA MÃN ĐK LÀ:\(n-3\ne0\Rightarrow n\ne3\)
\(5-n\ne0\Rightarrow n\ne5\)
Exercise1: Find the word which has a different sound in the underlined part
1. A.hear B.fear C.dear D.wear
2. A.near B.appear C.bear D.idea
3. A.fear B.smear C.bear D.weary
4. A.area B.year C.parents D.prepare
4. A.swear B.period C.here D.pierce
Exercise2: Make question for the words
1. My father was in Hà Nội last month.
→→ when was your father last month?
2. He travelled Nha Trang by coach.
→→.how did he travel to Nha Trang?
3. She went to the doctor because she was sick.
→→.why did she go to the doctor?
4. Nam left home at 7 o'clock yesterday.
→when did Nam leave home yeasterday?
5.Her mother gave her a blue dress.
→what did her mother give her?
6. I went to Nha Trang last summer vacation.
→.where did you go last summer vacation?
7. Mrs Robinson put the poster on the wall.
→where does MRs.Robinson put the poster?
8. Theu returned to America two weeks ago.
→when did they return to America?
Exercise1: Find the word which has a different sound in the underlined part
1. A.hear B.fear C.dear D.wear
2. A.near B.appear C.bear D.idea
3. A.fear B.smear C.bear D.weary
4. A.area B.year C.parents D.prepare
4. A.swear B.period C.here D.pierce
Exercise2: Make question for the words
1. My father was in Hà Nội last month.
→ Where was your father last month?
2. He travelled Nha Trang by coach.
→How did he travel to Nha Trang?
3. She went to the doctor because she was sick.
→Why did she go to the doctor?
4. Nam left home at 7 o'clock yesterday.
→What time did Nam left home yesterday?
5.Her mother gave her a blue dress.
→What did her mother give her?
6. I went to Nha Trang last summer vacation.
→When did you go to Nha Trang?
7. Mrs Robinson put the poster on the wall.
→Where did Mrs Robinson put the psoter?
8. They returned to America two weeks ago.
→When did they return to America?
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