Ex5: Give the correct word form:

1. (Live) in the city is more interesting than in the countryside. 2. Vietnam has many ( sand) beaches. 3. She is my ( neighborhood) 4. The dogs are very ( friend ) 5. I like walking (good ) than cycling. 6. It is very ( importance) to learn all new words by heart. 7. She is as age as me.

Ex5: Give the correct word form:

1. A trip to Fansipan is an ( forget ) experience. 2. You can watch ( tradition ) villages when you visit Sapa. 3. You must take an umbrella because it is ( rain ) in Mui Ne at this time of the year. 4. Hue is near Da Nang but it is more ( interest ) than Da Nang. 5. You can join many ( act ) during the festival. 6. He likes to wear ( tradition ) clothes.

7. Traveling by train is ( fast ) than by motorbike

Bài 8: Viết các biểu thức sau đây dưới dạng a^n (a e Q; n e N*)

a, 9. 3^5. 1/81 ; b, 8.2^4: (2^3.1/16) ; c, 3^2.3^5:1/27 ; d, 125.5^2.1/625

Bài 12: Tính:

a) (-0,1)^2.(-0,1)^3 ; b) 125^2 : 25^3 ; c) (7^3)^2 : (7^2)^3 ; d) (-2)^3+2^2+(-1)^20+(-2)^0 ; e) 2^4+8.[(-3)^2 : 1/2]^0-2^-2.4+(-2)^-2

Bài 9: Tìm x, biết: a) (x-3)^2=1; b) ( x - 1/ 7 )^2 =0 ; c) ( 2x +3)^3= -27; d) ( 2+1/2)^2 =1/4 .x; e) -(5+35.x)^2=36

Mong các bạn giúp đỡ mình nhé! Mình cảm ơn!