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Bạn xem lại đề có phải sai ko nhé!
5^2x-3 thì là 5^(2x-3) phải ko? Bạn nên ghi đề rõ ràng để có đáp án đúng nhất nhé
\(A=\left(2+\dfrac{1}{5}-\dfrac{2}{3}\right)+\left(3-\dfrac{4}{5}+\dfrac{2}{3}\right)-\left(1+\dfrac{7}{5}-\dfrac{3}{5}\right)\)
\(A=2+\dfrac{1}{5}-\dfrac{2}{3}+3-\dfrac{4}{5}+\dfrac{2}{3}-1-\dfrac{7}{5}+\dfrac{3}{5}\)
\(A=\left(2+3-1\right)+\left(\dfrac{1}{5}-\dfrac{4}{5}-\dfrac{7}{5}+\dfrac{3}{5}\right)+\left(-\dfrac{2}{3}+\dfrac{2}{3}\right)\)
\(A=4+\dfrac{-7}{5}+0\)
\(A=\dfrac{20}{5}+\dfrac{-7}{5}=\dfrac{13}{5}\)
Bài 1:
a)|x+1|-5=20-(-5)
\(\Leftrightarrow\)|x+1|=30
\(\Leftrightarrow\)\(\left[{}\begin{matrix}x+1=30\\x+1=-30\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=29\\x=-31\end{matrix}\right.\)
Vậy x=29 hoặc x=-31.
b)(-7)-|x+1|=32+(-11)
\(\Leftrightarrow\)|x+1|=28
\(\Leftrightarrow\left[{}\begin{matrix}x+1=28\\x+1=-28\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=27\\x=-29\end{matrix}\right.\)
Vậy x=27 hoặc x=-29.
tìm từ khắc với từ còn lại:
a) 1.fish 2.listen 3.time
b) 1.do 2. to 3. movies 4.go
c) 1.I 2. like 3.milk 4.die
d) 1. cold 2.close 3.hot 4.slow
e) 1.sea 2. tea 3 teather 4 weather
f) 1.chest 2.hand 3.head 4.toe 5.finger 6.big 7.noes
g) 1. table 2.chair 3 desk 4.couch 5.bench 6.hand
h)1.father 2.mother 3 sister 4.brother 5. people 6. uncle
i) 1. come 2. sit 3.desk 4.open 5. close 6. read 7.write 8. travel
a) 1.fish 2.listen 3.time
b) 1.do 2. to 3. movies 4.go
c) 1.I 2. like 3.milk 4.die
d) 1. cold 2.close 3.hot 4.slow
e) 1.sea 2. tea 3 teather 4 weather
f) 1.chest 2.hand 3.head 4.toe 5.finger 6.big 7.noes
g) 1. table 2.chair 3 desk 4.couch 5.bench 6.hand
h)1.father 2.mother 3 sister 4.brother 5. people 6. uncle
i) 1. come 2. sit 3.desk 4.open 5. close 6. read 7.write 8. travel
Em hãy viết danh từ số nhiều của những từ sau
1.Factory 2.Foot 3.Tomato 4. Bookshelf 5.Glass
1...........factories............. 2...........foots................. 3..............tomatoes................... 4.............bookshelves................ 5............glasses..............
1. * 5 sentences using countable nouns
- I have two cats
- There are 44 students in my class
- My schools has 3 floors
- English alphabet has 26 letters
- There are 100 trees in the parks
* 5 sentences using uncountable nouns
- There aren't any milk in the fridge
- Do you have any money ?
- I need some water
- I don't have much time
- I want some meat to cooking
2.
* 5 sentences using question how much and how many
- How many people in your family ?
- How many letters in English alphabet ?
- How much dogs does she have ?
- How many apple do you buy ?
- How many flowers in the vase ?
- How much money do you borrow me ?
- How much time do you have ?
- How much beef do you need ?
- How much food do you want ?
- How much milk do you need ?
nhấn nhầm tiếng anh