a)           7^0 = 0 ; 7^1=7 ; 7^2 = 49 ; 7^3 = 343 ; 7^4=2401 ; 7^5 = 16807 ;.....

⟹ 7 có số mũ là số chẵn thì thường có chữ số tận cùng là 1,9

7^6 =......9 ; 7^5=......7 ; 7^4=......1

⟹ ....9 +.....7-....1=5

mà 55=5.11⟹ 7^6 +7^5-7^4 : 5 thì : 55

mà số chia hết cho 5 thì có tận cùng là 0,5 .phéptính 7^6+7^5=7^4 có tận cùng là 5 ⟹ 7^6+7^5-7^4 : 55 

vậy 7^6+7^5-7^4 : 55

work/ environment./ to protect/ They/ wildlife/ and/

They work to protect environment and wildlife

make/ enough/ sure/ everyone/They/ has/ food.

They make sure everyone has enough food

Wash/ before/ bottles/ recycle/ you/ them

Wash bottles before you recycle them

throw/ away/ food./ Don't
Don’t throw food away

1.  How many teachers are there in your school?

ð How many teachers does your school have ?

2.  The toy store is to the right of the bakery.

ð The bakery is to the left of the toy store

3.  Do you and your friends walk to school every day?

ð Do you and your friends go to school by foot every day? /do you and your friends go on foot to school everyday

4.  We have English class at 7.15.

ð Our English class starts at 7.15

5.  Let us go to the beach and have a good time there.

ð How about going to the beach and having  a good time there ?

6. Is there a colorful picture in your room?

ð Does your room have a co

lorful ?

7. How much is a bowl of noodles?

ð What is the price of a bowl of noodles ?

8. I have a brother and two sisters.

ð I have three siblings

9. I spend two hours a day doing my homework.

ð It took me two hours a day to do my homework

10. No one in my class is as lazy as Tom.

ð Tom is the laziest student in my class