công thức:

tính số số hạng:(50-2):2+1=25

tính tổng:(2+50):2x25=650

tick nha

a² khi chia cho số 6 sẽ có số dư là 1

VD:5 không chia hết cho 3 nen 5² =25 vay a² chia cho 6 du 1

3.6% đóNguyễn Huỳnh Ngọc Nhi

hang chuc ngin cua  2015 la 2 hang ngin la 0

hang chuc ngin cua 2016 la 2 hang ngin la 0 

                   BAN DA HIEU CHUA 

36% la 10000000000000000000.......................................................% luôn

Số học sinh cả lớp là: 18+12=20 (học sinh)

Số học sinh nam chiếm số phần trăm học sinh cả lớp là: 12:30x100=40%

Đ/S:40%

Tick nha!!

1.Arthur said he was sorry he had hurt her feeling

->Arthur apologised:" I have hurt her feeling"

2. I am amazed by the mistakes he makes

->What a amazed by the mistakes he made.

I was sick yesterday so I can't go to school yesterday! Sorry, teacher!

1.The tourist guide took us to many interesting places

2.Her family moved to a new apartment last week

3.How did you return to Ha Noi?-By plane

4.I live far from my close friend but we still keep in touch by

5.I helped my mother to do a lot of housework yesterday.

6.What did you buy for your friend on her birthday?

7.My aunt often makes clothes for me.She is very good at sewing

8.Liz helped me a lot of my stamp collection

9.Did you tell your classmates to your vacation in Nha Trang

10.There is a souvenir shop near the exit of the zoo