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ê c*c tau đi đâu cũng gặp mày hết á

Bài 4: Gọi số cần tìm có dạng là \(\overline{2ab}\)

Nếu xóa chữ số 2 đó đi thì được số mới bằng 1/5 số cần tìm nên ta có:

\(\overline{ab}=\frac15\times\overline{2ab}\)

=>\(\overline{2ab}=5\times\overline{ab}\)

=>\(200+\overline{ab}=5\times\overline{ab}\)

=>\(4\times\overline{ab}=200\)

=>\(\overline{ab}=50\)

Vậy: Số cần tìm là 250

B1 và cái j

M nhớ hôm qua mik lm câu hình này r

đâu có bài 6 đâu bạn 

3 has eaten

4 haven't seen

5 have been driving

6 has lost

7 has written

8 has been writing

9 has found

10 has spent

-_-

bạn phải ghi đề rõ ràng chứ

what????

bn ghi zậy sao mk hỉu dk

8 He asked the asreonaul how long he had been living on the International ....

9 The students wanted to know when human would go to Venus

10 I asked Sally and Andy where they were going that summer holidays

VIII

1 Tin said he had been here three months before

2 He wanted to know when the next train left

3 She asked me If I were meeting Judy at four o'clock that day

4 Jane told me She had already seen that exhibition

5 My mother asked me who I had meet at the party the week before

6 Miki said that that were having dinner then, so she could only talk for a few minute

7 I asked Peter is I might use his phone

8 The Prime Minister announced that public sending would be increased the year after

9 Peter said that his father drunk a cup of coffee every morning before going to work

10 I asked the old woman how long she had lived there