1 + 4 + 9 + 16 + 25 + 36 + 49 + 64 + 81 +  100 = 295

du ghi lon 2^3 thanh 2^4 nhung ket qua van dung nha

3/5 = 0,6

Chiều rộng hình chữ nhật :

  2 - 0,6 = 1,4 ( m )

Chu vi hình chữ nhật :

 ( 2 + 1,4 ) x 2 = 6,8 ( m )

đ/s : 6,8 m 

Nếu thêm 48 đ/v vào số bé ta được số lớn=>Số lớn hơn số bé 48 đ/v

Ta có sơ đồ:(bạn tự vẽ nha)

Hiệu số phần bằng nhau là:5-2=3(phần)

=>48 ứng với 3 phần.

1 phần tương ứng với:48:3=16

Số bé là:16x2=32

Số lớn là:32+48=80

Đáp số:Số bé:32  

             Số lớn:80

tong la:

 49+51=100

             dap so:100

=1+2+3+40

=3+3+40

=6+40

=46

Exercise 10. Turn these sentences into passive voice.

1. People invented the wheel thousands of years ago.

→ The wheel was invented thousands of years ago.

2. My father waters these flowers every morning.

→ These flowers are watered by my father every morning.

3. People use computers all over the world.

→ Computers are used all over the world.

4. Are they building a statue of Chu Van An?

→ Is a statue of Chu Van An being built?

5. John invited Fiona to his birthday party last night.

→ Fiona was invented to John's birthday party last night.

6. They keep many ancient things in museums.

→ Many ancient things are kept in museums.

7. Do four busy streets surround the Temple of Literature?

→ Is the Temple of Literature surrounded by four busy streets?

8. People make many famous films in Hollywood.

→ Many famous films are made in Hollywood.

9. Her mother is preparing the dinner in the kitchen.

→ The dinner is being prepared in the kitchen by her mother.

10. I do all my homework on my computer.

→ All my homework is done on my computer.

Good luck!

sai de rui

bn oi

tk nhe@@@@@@@@@@@@@@@@@@@@@

lol

=290.Study well!

Minh có số que tính là :

  13 : 2 = 26 ( que )

Cả hai bạn có số que tính

   13 + 26 = 39 que

Đ/S: 39 que

tk nha chúc bn học giỏi