f
d
1+2+3+4+5+6+7+8+9+10
= (1+9)+(2+8)+(3+7)+(4+6)+5+10
= 10+10+10+10+10+5
=50+5
=55
ý là aii hỏi
227/18
celebrate
C nha
10,0 lần
I find reading book is useful hobby.
His hobby is playing guitar in his freetime.
She began collecting dolls when she was ten.
My school is Greenfield Primary School. It is in Thai Nguyen. There are 36 classes in my school. We study many subjects like Vietnamese, maths, and science. I like my school very much because it has a big library and a nice playground.