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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: \(=\dfrac{\dfrac{4}{36}-\dfrac{30}{36}-\dfrac{144}{36}}{\dfrac{21}{36}-\dfrac{1}{36}-\dfrac{360}{36}}=\dfrac{-160}{-340}=\dfrac{8}{17}\)
1.Five ten.
2. half past eight
3. nine forty-five
4. a quarter past seven or seven fifteen
5.ten fifty-five
6.eleven o'clock
7.twelve fifty
8.two thirty-five
9.four o'clock
10, six forty
1. 5:10
=> It's five ten
2. 8:30
=> It's half past eight3. 9:45
=> It's a quarter to ten
4. 7:15
=> It's a quarter past seven5. 10:55
=> It's five to eleven6. 11:00
=> It's eleven o'clock7. 12:50
=> It's ten to one8. 2:35
=> It's two thirty-five9. 4:00
=> It's four o'clock10. 6:40
=> It's twenty to seven
căn hộ
ban công
tầng hầm
nhà xe
phòng tập thể dục
Sân
giường
sạch sẽ
bữa tối
món ăn
bếp
giặt ủi
mua sắm
trung tâm
thành phố
phía đông
phía bắc
phía nam
Thị trấn
thôn
phía tây
1. căn hộ: ................ 2. ban công: ................ 3. tầng hầm: ............... 4. nhà xe: ........... 5. phòng tập thể dục: ............. 6. yart: .......... 7. giường: ............ 8. sạch sẽ: ............ 9. bữa tối: ............. 10. món ăn: ............. 11. bếp: ............. 12. giặt ủi: ............... 13. mua sắm: .............. 14. trung tâm: ............. 15. thành phố: ........... 16. đông: .......... 17. phía bắc: ........ 18. Miền Nam: .......... 19. Thị trấn: ............ 20. thôn: .......... 21. phía tây: ............
1, a
2, a
3, an
4, an
5, a
6, an
7, a
8, an
9, a
10, an
11, a
12, a
13, a
14, an
15, an
16, an
17, a
18, a
19,a
20. a
Tìm x, biết:
a. 12 + x = 122
=> x=122-12
=> x= 110
b. | x | + 4 = 8
=> /x/=8-4
=> /x/=4
=> x={4;-4}
c. 3x - 5 . 32 = 32 . 4
=> 3x=32.(4+5)
=> 3x=32.32
=> 3x=34
=> x=4
a)
\(12+x=122\)
=> \(x=110\)
Vậy \(x=110\)
b)
\(\left|x\right|+4=8\)
\(\Rightarrow\left|x\right|=4\)
\(\Rightarrow\left[\begin{array}{nghiempt}x=4\\x=-4\end{array}\right.\)
Vậy x=4 ; x = - 4
c)
\(3^x-5.3^2=4.3^2\)
\(\Rightarrow3^x=3^2\left(4+5\right)\)
\(\Rightarrow3^x=3^4\)
=> x=4
Vậy x=4
Exercise 1: Change the verbs into simple past form.
1. Be: .was/ were....
2. Play: ...played..
3. Build: ...built..
4. Do: ...did..
5. Bring: ..brought...
6. Read: ...read..
7. Listen: ..listened...
8. Learn: ..learnt/ learned...
9. Drink: ..drank...
10. Work: ..worked...
Bạn tham khảo
- In 2016, Skrein played the lead villain, Ajax, in the blockbuster action film Deadpool.
- She had some exciting adventures in Egypt.
- Their upcoming wedding was announced in Saturday's newspaper.
-The secret to public speaking is to get the audience on your side.
- He's the creator of a successful cartoon series.
- The commentary on the Olympic games was much better on the other channel.
- I'd prefer an old place with a bit of character.
- He has hosted several popular quiz shows and now has his own chat show.
- He gave a clumsy bow.
- I prefer Shakespeare's comedies to his tragedies.
\(a,x-\dfrac{3}{4}=\dfrac{1}{7}\\ x=\dfrac{1}{7}+\dfrac{3}{4}\\ x=\dfrac{25}{28}\\ b,x+\dfrac{7}{5}=\dfrac{9}{8}.\dfrac{4}{27}\\ x+\dfrac{7}{5}=\dfrac{1}{6}\\ x=\dfrac{1}{6}-\dfrac{7}{5}\\ x=\dfrac{-37}{30}\\ c,\dfrac{2}{5}-\dfrac{3}{7}=\dfrac{x}{70}\\ \dfrac{-1}{35}=\dfrac{x}{70}\\ \dfrac{-2}{70}=\dfrac{x}{70}\\ x=-2\\ d,\dfrac{2}{9}-\dfrac{7}{8}.x=1\\ \dfrac{7}{8}.x=\dfrac{2}{9}-1\\ \dfrac{7}{8}.x=\dfrac{-7}{9}\\ x=\dfrac{-7}{9}:\dfrac{7}{8}\\ x=\dfrac{-8}{9}\)
\(a,x-\dfrac{3}{4}=\dfrac{1}{7}\)
\(\Rightarrow x=\dfrac{1}{7}+\dfrac{3}{4}\)
\(\Rightarrow x=\dfrac{25}{28}\)
\(b,x+\dfrac{7}{5}=\dfrac{9}{8}.\dfrac{4}{27}\)
\(\Rightarrow x+\dfrac{7}{5}=\dfrac{1}{6}\)
\(\Rightarrow x=\dfrac{1}{6}-\dfrac{7}{5}\)
\(\Rightarrow x=-\dfrac{37}{30}\)
\(c,\dfrac{2}{5}-\dfrac{3}{7}=\dfrac{x}{70}\)
\(\Rightarrow\dfrac{-1}{35}=\dfrac{x}{70}\)
\(\Rightarrow35x=-70\)
\(\Rightarrow x=-2\)
\(d,\dfrac{2}{9}-\dfrac{7}{8}.x=1\)
\(\Rightarrow\dfrac{7}{8}x=\dfrac{2}{9}-1\)
\(\Rightarrow\dfrac{7}{8}x=-\dfrac{7}{9}\)
\(\Rightarrow x=-\dfrac{8}{9}\)