em mới lớp 5

Cách 1 :

Ta có : \(1-\frac{4}{11}=\frac{7}{11};1-\frac{8}{15}=\frac{7}{15}\)

Vì \(\frac{7}{11}>\frac{7}{15}\)nên \(\frac{4}{11}< \frac{8}{15}\).

Cách 2 :

Vì \(\frac{4}{11}< \frac{4}{8}=\frac{1}{2};\frac{1}{2}=\frac{8}{16}< \frac{8}{15}\)nên \(\frac{4}{11}< \frac{8}{15}\).

~ HOK TỐT ~

Cách 1:

  \(1-\frac{4}{11}=\frac{7}{11}\)

\(1-\frac{8}{15}=\frac{7}{15}\)

Vì \(\frac{7}{11}>\frac{7}{15}\Rightarrow\frac{4}{11}< \frac{8}{15}\)

Cách 2:

     \(\frac{4}{11}=\frac{60}{165}\)

      \(\frac{8}{15}=\frac{88}{165}\)

Vì \(\frac{60}{165}< \frac{88}{165}\)

\(\Rightarrow\frac{4}{11}< \frac{8}{15}\)

Cách 3:

    Ta có:

 \(\frac{4}{11}=\frac{8}{22}< \frac{8}{15}\)

\(\Rightarrow\frac{4}{11}< \frac{8}{15}\)

      Cách 4:

\(\frac{4}{11}-1=\frac{-7}{11}\)

\(\frac{8}{15}-1=\frac{-7}{15}\)

Vì \(\frac{-7}{11}< \frac{-7}{15}\)\(\Rightarrow\frac{4}{11}< \frac{8}{15}\)

đề thi hả bn

Bài 3: 

b: \(x\in\left\{3;-3\right\}\)

Tôi không biết là ai cũng muốn em nó 3

I.Hãy viết hình thức so sánh hơn và nhất của các tính từ sau:

1. So sánh ngang bằng.

a. This book/ not/ interesting/ I expected

_______This book is not as interesting as I expected________________________________________

b. Jack/ swim/ good/ Tom

______Jack swim as well as Tom_________________________________________

c. we/work/twice/slow/ they.

________We work twice as slowly as they (do)_______________________________________

d. A car/ not/run/ fast/ a train

____________A car does not run as fast as a train___________________________________

e. My father/ carve /skilful/ my grandfather

______My father carves as skillfully as my grandfather_________________________________________

2. So sánh hơn: (Nhấn mạnh các câu ss hơn)

a. My room/ comfortable/ yours

_____________My room is more comfortable than yours__________________________________

b. A plane/can fly/ quick/ a bird

_________A plane can fly more quickly than a bird______________________________________

c. Peter/ eat/ much/ I.

_______Peter eats more than I (do)________________________________________

d .Your house/far/from school /my house. ____My house is father from school than my house___________________________________________

e. My father / cook/ good/ I

___________My father cooks better than I do____________________________________

3. So sánh nhất: ( Nhấn mạnh theo 2 cách đã học)

a. Everest/ high/ mountion/ in the world

__________Everest is the highest mountain in the world_____________________________________

b. Mai/ talk/ slow / in my class.

____________Mai talks the most slowly in my class___________________________________

c. English coffee/bad/ of all.

__________English coffee is the worst of all_____________________________________

d. Anna/ behave/polite/ in the world.

__________Anna behaves the politest in the world_____________________________________

e. They / play the guitar/ good/ of all

.___________They play the guitar the best of all____________________________________

f. My grandmother/old/ in my village=>

_________My grandmother is the oldest in my village______________________________________

II. Complete the sentences using the correct form of the adjectives or adverbs in brackets

(chia về các dạng so sánh đúng)

ảnh bị lỗi

III. Cirle the best option to complete each sentence:

1. The flower was.......... out of a single piece of valuable wood. 

A. carved              B. moulded       

C cast                   D. given

2. In this town, they_____ all the frames in steel.

A. make               B. have                     C. mould                    D. cast

3. She is skilled at ____ cloth.

A. giving               B. weaving                C doing                      D. carving 

4. If you like, I can_____ flowers on the cushion covers for you.

A. grow                B. make                    C. embroider               D. knit

5. Is it true that you.......... this woollen hat yourself?

A. knitted             B. wove                    C did                          D. carved

6. The doll has been.......... out of clay.

A. embroidered      B. cast                    C. woven                  D. moulded

7. I love going to this place _____ it's the quietest place in the city.

A. so                     B. though                  C. so that              D. as 

8. They keep changing the decoration of the shop_______ they can attract more young people.

A. so that              B. because                C. although           D when

9.________ she's young, she's the most famous artisan in the village.

A. When                B. Although                C. Whereas           D. In order to

10. Do you know who's______ his pottery workshop?

A. bring out           B. taking over            C. passing down    D. turning down

11. I've_______ the product catalogue and decided to buy this table.

A. found out          B. closed down            C. looked through   D. lived on

12. This sports centre is so small that it cannot______the demands of local residents.

A. keep up with        B. face up to            C. deal about            D. setup

13. When I turned up, the town hall was already_____ of teenagers.

A. full                   B. packed     C. crowded           D. jammed

14. She turned ______the new job in New York because she didn't want to move.

A. on                   B. down  C. off                   D. up

15. This city has one of the most___ underground rail networks in the world.

A. efficient                           B. fashionable   C . cosmopolitan                   D. fascinated

4. This laptop is much more user-friendly, but it costs________ the other one.

A. so much as                  B. as many as     C. twice as much as         D. twice as many

5. Today's cities are____than cities in previous times.

A. lots larger                  B. much larger    C. as large                     D. the largest

6. After I found all the information I needed, I________the computer.

 A. turned off                 B. switched on    C. looked for                  D. put off

7. Japan is the__________ developed country in the world.

A. most second             B. second in most        C. second most             D. two most

8. Factories and offices should be built in __________areas only.

A. rural                        B. Coastal      C. culture                     D. urban

Nếu em chia nhỏ bài này ra làm khoảng 3 phần thì em sẽ nhận được câu trả lời của các bạn nhanh hơn em nhé! 

Ta có 2^30 x 9^15 = 2^30 x (3^2)^15

                             = 2^30 x 3^ 30

                             = (2x3)^ 30

                             = 6^30

Vậy 6^30 = 2^30 x 9^15

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Mình quên,  mình thiếu hiệu diện tích tam giác IBC và IMN là 7,5 cm2