theo mình là con rết

10100

77 - 24 = 53

27 - 17 = 10

K mk nha

Kb nhé

quên mất 1 thứ 

Bài này tính thuận tiện nè :

10 x 20 x 50 x 90 x 80 x 70

Ta thấy các số trên đều chia hết cho 10 nên gộp lại :

( 1 x 2 x 5 x 9 x 8 x 7 ) x số chữ số 0

Nhân với 1 giá trị ko đổi . 

2 x 5 = 10

8 x 9 = 72 

72 x 7 = 504

504 x 10 x số chữ số 10

= 5040 x 1000000

= 5040000000

2. We/ go shopping

+We will go shopping.

- We won't go shopping.
3. the sun/ shine

+The sun will shine.

-The sun won't shine.
4. Peter/ call you.

+ Peter will call you.

- Peter won't call you.
5. they/be/ there.

+ They will there.

- They won't there
6. you/ ask/him.

+ You will ask him.

- You won't ask him.
7. Jenny/ lock/the door.

+ Jenny will lock the door

- Jenny won't lock the door.
8. it/ rain

+ It will rain.

- It won't rain.
9. the teacher/ test/ our English.

+ The teacher will test our English.

- The teacher won't test our English.
10. they/ buy/ a car.

+ They will buy a car.

- They won't buy a car.

xin lỗi mình nhầm

chu vi hình chữ nhật là

[26+8]x2=68 [cm]

Đs : 68 cm

12.000000$ + 111.00000$ = 23.100.000$.

1 + 12 = 13

25,7 la dung 10000000000000000000000000000000000000000000000000000%

h cho mk nhe!!