bằng 1/5. k nha

dấu / là dấu chia hay phân số zậy bạn

Xe máy đi trước ô tô quãng đường là :

40 x 1/2 = 20 (km)

Hiệu vận tốc của hai xe là :

55 - 40 = 15 (km/giờ)

Thời gian ô tô đuổi kịp xe máy là :

20 : 15 = 4/3 (giờ)

Đổi 4/3 giờ = 80 phút = 1 giờ 20 phút

Đáp số : 1 giờ 20 phút

Use the correct form of the words in parentheses:

15. Thanh Bach is a ..........FAMOUS (???).....................actor

16. The streets are filled with a......JOYFUL....................atmosphere when Tet comes (joy)

17. ...........Labeling ......................schemes for refrigerators and washing machines help save energy (label)

18. Consumers like to use products which are both..............effective....................and economical (effect)

19. .....Consumer.......................will be very pleased with the new products. (consume)

20. He rarely expresses his..........feeling................to others. (feel)

Môn chạy xe đạp

Cái bóng của các loài động, thực vật và con người trên trái đất

Jacob Grimm (1)...WAS... born in January 1785 and his brother was born in February 1786 in Germany.Their father was a lawyer,and they (2).HAD... six more brothers and one sister.In 1802, Jacob(3)....WENT... to university to study law at the University of Marburg.As always,his little brother followed him,and entered law school (4).......IN.... 1803.During their university years they began to collect folk and fairy tales.Folklore is stories that have been passed down from parents to children, by(5)...WORD... of mouth,but at that time many had not been published in books.The Grimms were especially interested (6)...IN.... stories that included Germany and German culture.Jacob and Wihelm published their first book of fairy tales -"Children's and Household Tales"-in 1812.There (7) ....WERE....... 86 folktales.Readers were so happy to see the stories they had been(8)..TOLD... as children all collected together.Therefore,the book was a success.In the next volume of"Grimm's Fairy Tales",the brothers added 70 more stories.It went on growing like this for six more editions.Finally,the book contained over 200(9)...STORIES....! It is probably the best-known work of German literature.Even if you don't know the Brothers Grimm, you definitely(10)..KNOW... a Grimm fairy tale.

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