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\(x\times\dfrac{20}{11}=\dfrac{1}{1}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{9}+\dfrac{1}{9}-\dfrac{1}{11}\\ x\times\dfrac{20}{11}=\dfrac{10}{11}\\ \Rightarrow x=\dfrac{1}{2}\)
Ta có :
=> X x 20/11 = ( 1 - 1/3 ) + ( 1/3 - 1/5 ) + ( 1/5 - 1/7 ) + ( 1/7 - 1/9 ) + ( 1/9 + 1/ 11 )
=> X x 2/11 = 1 - 1/11 = X x 1/11 = 11/11 - 1/11
=> X x 20/11 = 10/11
=> X = 10/11 : 20/11
=> X = 1/2
Bạn ơi nên xem lại đi đây là ONLINE MATH chứ ko phải ENGLISH đâu mà còn ghi toán lớp 5 nữa!
My name is Quang. I live in Can Tho. It is in the south of Viet Nam. There are only two seasons here. They are the dry season and the rainy season. The dry season lasts from November to April. It is usually cool and dry in this time of the year. This is my favourite season because I can go for a picnic with my friends. The rainy season lasts from May to October. It is usually hot and wet. There is a lot of wind too.
(1) south, (2) November, (3) picnic, (4) season, (5) wind.
a, don't ****
b,is,works
c,visiting
d,are,doing,am doing
e,are
f,is landing
g,is watching,watches
a. don't ****
b. is/ works
c. will visit
d. are doing/ am doing
e. is
f. is going to land
g. is watching/ watches
1) There were twenty students in my class last year.
2) We went to the zoo with our parents yesterday.
3) He lives in a house in the countryside.
4) The girls are planting trees in garden.
5) I stayed at home this morning because I was tired.
there's a beautiful flower garden next to my house
there í no need to hurry
they love working with children very much
can you give me some papers ?
my friends often give me books as presents
There's a beautiful flower garden next to my house.
there is not need to hurry.
They love working with children very much.
Can you give me some paper?
My friends often give me as presents.