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2 tháng 10 2016
15*15+14*14+13*13+12*12+11*11+10*10+9*9+8*8+7*7+6*6+5*5+4*4+3*3+2*2+1*1=1240(cans)
Đáp số 1240 cans nha bạn.
greatest resultly for mathemas contest Violympic.
AC
23 tháng 2 2017
Exer 1:
Solution:
Suppose that, the unknown number is: \(\overline{x215}\) (where x \(\in\) N).
When we clean three digits then the smaller number is \(\overline{x}\).
We have: \(\overline{x215}\) + \(\overline{x}\) = 78293
\(\Rightarrow\) 1000. \(\overline{x}\) + 215 + \(\overline{x}\) = 78293
1001. \(\overline{x}\) = 78078
x = 78
Thus, we found two natural number: 78215 and 78.
Exer 2:
Solution:
We have: x + 2y \(⋮\) 5
\(\Rightarrow\) 2x + 4y \(⋮\) 5
(2x + 4y) + (3x - 4y) = 5x \(⋮\) 5
\(\Rightarrow\) 2x + 4y \(⋮\) 5
Deduce 3x - 4y \(⋮\) 5.
Exer 3:
Solution:
We have: 2x + 5y \(⋮\) 7
4x + 10y \(⋮\) 7
(4x + 10y) - (4x + 3y) = 7y \(⋮\) 7
\(\Rightarrow\) 4x + 10y \(⋮\) 7
Deduce 4x + 3y \(⋮\) 7.
19 tháng 7 2015
We finish the letter with love and our first name.
**** nhe
4 tháng 11 2017
làm bài này chắc đến lớp cô toán không hiểu gì đâu,lại tội cho cô phải hỏi thăm chị google dịch
LT
4 tháng 11 2017
1. take, is rainning
2. are you? am having
3. get, rises
4. enjoy ,
5. enjoy, stay
6. destroy. is
7. Does_grow?
8. don't produce
9. has, produces
10. build
KN
27 tháng 6 2019
1. Our sources of energy will soon end if we don't try to save them
Unless.we try to save our sources of energy, they will soon end ................................................................................................
2. Barbare plays chess better than Mike
Mike doesn't ....play chess as well as Barbare ....................................................................................
3. We will probably visit Japan in the future.
We might ...visit Japan in the future.............................................................................................
4. My brother can run very fast
My brother is....a fast runner.......................................................................................
5 . Uless we protect the envirronment,we will destroy ourselves
If ....we don't protect the environment,we will destroy ourselves........................................................................................................
KN
27 tháng 6 2019
6. Uless she is more hard working , she will get low marks
If ....she isn't more hard working , she will get low marks...........................................................................................................
7. Uless he listens to his parents,he will fail
If ...he doesn't listen to his parents,he will fail.............................................................................................................
8. They began watching the movie one hour ago
They have .watched the movie for one hour................................................................................................
9 . He last cried ten years ago
He has.....never cried for ten years.....................................................................................................
tiếng anh lớp 6 nhé
Tra loi:
If we recycle bottles and cans we will help the environment.
hoc tot