Writing:
1.
1,Computer studies is Trong 's favourite subjects.
2,Mrs Hoa is our teacher of English.
3,There are six coloured pencils in my friend 'box.
4,Where does Lan live?
5,Shall I introduce you to my best friend ,An Son.
Reading:
1.Why was Tom nervous at fist?
-Because the teacher are all new to he,mót of his classmates are new too.
2.What are Tom 's teachers and friends like?
-They are all nice to him
3.What his favourite subject?
- His favourite subjects is computer studies.
4.What the club does he want to join?
-He wants to join the judo club.
5.Is Tom having a nice fist week at his new school?
- Yes ,he is.
Toán.
Ta có: ( ab + ba )
= ( 10a + b) + ( 10b + a)
= 11a + 11b
Vì 11a và 11b đều chia hết cho 11.
Suy ra: ( ab + ba )chia hết cho 11.
