Chu vi = 2 x (Dài + Rộng) 
Chu vi : 2 = Dài + Rộng 
Mà: Chu vi = 10 x Rộng 
Vậy: (10*Rộng) : 2 = Dài + Rộng 
5*Rộng = Dài + Rộng 
Dài = 5*Rộng - Rộng 
Dài = 4*Rộng 

ĐÁP SỐ: Chiều dài gấp 4 lần chiều rộng. 
CHÚC VUI NHÉ.

Theo bài ra ta có : 

(CD + CR) x 2 = CR x 10 

<=> CD + CR = CR x 5 

<=> CD = CR x 5 - CR

<=> CD = CR x 4

Vậy chiều dài gấp 4 lần chiều rộng 

ai nhanh mk tk nha

1.She does her homework every evening.

2.She doesn't her homework at the moment.

3.I not usually stay up late.

1. She does her homework every evening.
2. She isn't doing her homework at the moment.
3. I don't usually stay up late.
4. Lan always helps her mother do the housework.
5. How far is it from your house to the supermarket.
6. How does Miss Lien go to work.
7. Lan's new house is larger than her old house.
8.China is larger than Viet Nam.

She does her homework every evening.
She isn't doing her homework at the moment.
I don't usually stay up late.
Lan always helps her mother do the housework.
How far is it from your house to the supermarket.
How does Miss Lien go to work.
Lan's new house is larger than her old house.
China is larger than Viet Nam.

Theo bài ra, ta có:

a chia 7 dư 2 => đặt a = 7q + 2  (...)

b ____7___3 => đặt b = 7k + 3   (...)

=> a + b = 7q + 2 + 7k + 3

=> a + b = (7q + 7k) + (2 + 3)

=> a + b = 7(q + k) + 5chia 7 dư 5.

Vậy...

Câu 1: B

Câu 4 :C

câu 1 :b

dài vậy????????/?/??//.........

does-come

Does-come

going fishing

going fishing nhé bạn à mà bạn chơi Quizizz phải ko

going fishing