37m8,

 Gọi số lớn là a , số bé là b.

Theo bài ra ,ta có :

a+b=340

a=4b=>a=4(340-a)=1360-40

=>1360=4a+a=5a

=>a=1360:5=272

=>b=340-272=68.

Cho em với

1. $A=\left\{x\in N|x=2k+1,x<50\right\}$

2. $B=\left\{x\in N|x=11k,x<100\right\}$

have similar intersts : có cùng sở thích 

have similar intersts : có cùng sở thích 

My family have 4 people. There are my mother,my father,my elder sister and me.My parents are both the same age, 50 years old.My father is a teacher ,he is very kind and hard-working. My morther is a nurse, she is interesting, I think she is the most funny person in my family. My elder sister is 18 years old, she is a student and she is very pretty,she not only learns well but also plays the piano very well, I think she will become a pianist in the future. And me, I’m 16 years old and I’m a pupil, in the future i'll be a marketing staff. I love my familly very much.For me, family always is the assured a reliable support.