tích mới là:

8x6=48

       Đáp số :48

Học đồng dư thức chưa bạn ?

1.I want (go/to go/going)swimming

2.We (should/shouln't/mustn't)wash our hands before the meal

3.This Saturday we (is going/are going/go)to the art museu

4.He (is playing/do/is doing)judo with friends.

5.The woman comes from (japan/american/vietnamese)

1.Are there seventeen boys in your class?

Does your class has seventeen boys ?

2.Lan is sitting behind Ba.

Ba is sitting in front of Lan.

3.Linh has long black hair.

Linh's hair is long and black.

4.I like English very much.

My favourite subject is English.

Ta có: 12=2².3 15=3.5 20=2².5

BCNN(12;15;20)= 2².3.5= 60

Vì ƯCLN(a,b)=15 nên a⋮15 hay a=15 . m

b⋮15 hay b=15. n

(m,n ∈ N*, ƯCLN(m,n)=1)

Ta có: a+b=120

hay: 15.m+15.n=120

15.(m+n)=120

m+n=120:15

⇒ m+n=8

Ta có bảng sau:

Vậy a= 18; b= 126

a= 126; b= 18

a= 54; b= 90

a= 90; b= 54

voo lis

Tí không có quá 80 viên

1.Is Mary ........home? I want to speak to her.

A.in B.at C.on D.By

2.how often ......you.....to see the doctor? twice a year

A.do/go B.did/go C.are/going D.does/went

3.there weren't tv........orengesin the fridge yesterday

A. some B.any C.no D.lot

Since when you knew Mary? ⇒I known her since I was in the high school.

Thì hiện tại hoàn thành.