Lưu Anh Đức: không được đặt dấu ''='' giữa 2 vế ở biểu thức cuối, 0x không thể bằng 1

xoay đồng hồ thì nói làm gì!

Số học sinh khối 1 có là

1000 : 4 = 250 ( học sinh ) 

Số học sinh khối 1 và khối 2 là 

250 + 180 = 430 ( học sinh ) 

Tổng số học sinh khối 3,4 và 5 là

1000 - 430 = 570 ( học sinh ) 

Số học sinh khối 3 có là

570 : 3 = 290 ( học sinh )

Đáp số 290 học sinh

Tick nha các bạn

=>(a+3) là ước của -8 => thuộc (1;-1;2;-2;4;-4;8;-8)

Tự thử chọn bạn nhé

coi cạnh hv ban đầu là 100% thì cạnh hv mới là

              100%+10%=110%

S hv mới là

              110/100x110/100=121/100=121%

S tăng là

             121%-100%=21%

                                        đ/s:21%

tik mình nha bạn yêu quý!^_^        

số các số chẵn có 4 cs là

            (9998-1000):2+1=4500(số)

tik nha bn yêu quý!

3x + 4y - xy = 16

<=>  x(3 - y) + 4y = 16

<=> x(3 - y) - 12 + 4y = 16 - 12

<=> x(3 - y) - 4(3 - y) = 4

<=> (x - 4)(3 - y) = 4

=> x - 4 thuộc tập hợp ước của 4 

Mà 4 = 1.4 = -1.(-4)

Ta có bảng:

Vậy các cặp (x;y) thỏa mãn đề bài là (5;-1), (8;2), (3;7), (0;4)

Tik cho mình nhá!!

tich minh di ban

-writing a paragraph about one's favoutite flim

Harry Potter is one of my favourite movies. This movie becoming my favourite since it has been held on theatre eight years ago. In my opinion, the story is totally awesome. Based on the best seller novel by JK.Rowling, this movie becomes real. I mean that the story is fiction, but it looks real when we see the movie. This movie story tells about Harry Potter, he is a wizard child. Since he was a baby, his parents died by the hand of The Dark wizard,Voldemort. So, he had to struggled on his whole life. When he turned to a young boy, Hogwart school of wizard and wizardry sent him a message that he is a student of that school. In there, he learned everything about magic, and also he found his true friendship, Hermione Granger and Ron Weasley. They always helped Harry Potter in everything, whether is right or wrong. They do this all together, happiness or sorrow. Harry Potter also learned how to love his parents, friends, teachers, and everything.
When Voldemort comes to kill Harry Potter, Harry against hard to be win. His best friends helped him until they comes to chaotic, but they still hold out.
From the story, i learn something about love, friendship, against everything bad, with our courageous and our heart and soul. That’s why this movie becoming my favourite ever, because the story is touching, even it’s just a fiction story. But it doesn’t mind, because we get everything in this movie, the great adventure, and the philosophy of this movie, definitely Harry Potter is my favourite.

28 cm2 nha ban tích đi