Giá 1 cái áo là :100000 đồng, 1 cái quần:150000 đồng vì:

- 3 cái áo và 4 cái quần = 100000 x 3 +150000 x 4 = 300000+600000 = 900000 đồng.

- 5 cái áo và 1 cái quần = 100000 x 5 +150000 x 1 = 500000+150000 = 650000 đồng.

là sao vậy bn ??

bạn phải ghi rõ phép tính ra chứ ghi mỗi cái đề bài vậy?

Năm 2011 giảm 10% so với năm 2010

=> Năm 2010 là 100% thì năm 2011 là : 100% - 10% = 90%

Phần trăm năm 2012 tăng 10% so với năm 2011 : 90% + 90% x 10% = 99%

Vậy số học sinh năm 2012 giảm so với năm 2010 là : 100% - 99% = 1%

I, use the prompts to write  sentences, putting the verb in present simple passive

1, cheese/ make/ from milk.

=> Cheese is made from milk.

2, the Temple/ visit/ thousands of people/ every year.

=> The temple is visited by thousands of people every year

3, Toyota cars/ produce/ Toyota Motor Corporation.

=> Toyota cars are produced by Toyota motor corporation

4, German/ also/ speack/ at EU meetings

=> German is also spoken at EU meetings

5, Most newspapers/ print/ on recycled paper.

=> Most newspapers are printed on recycled paper

6, the Imperial Academy/ consider/ the first university in vietnam

=> The imperial academy is considered the first university in vietnam

7, Three millilitres of water/ add/ to the mixture

=> Three milliliters of water is added to the mixture

8, The letters/ deliver/ the postman/ at 8 o'clock

=> The letters is delivered by the postman  at 8 o'clock

II. complete the sentences using the past simple passive from of the verbs in brackets

1, The Temple ofliterature .......was constructed...........(construct) in 1070 under Ly Thanh Tong's dynasty.

2, the statues ......were built.....(build) by the Ha Noi people's committee in 2003.

3, the Doctors' stone tablets........were recognised......( recognise) by UNESCO in 2010.

4, the constrDuc temb .......was completed..........(complete) in 1876.

5, the students of the Imperial Academy ( thiếu đề bài )

6, Originally, the Po Nagar tower .............was made................( make) of wood in order to worship Goddess Po Nagar

7, Between, 1442 and 1779, eighty-one exams......were holded.......(hold) by the Le drynasty

8, Chu Van An ........was beared........(bear ) in Van Thon village, Thanh Dam district