Tim X:

a)4^x=64                                         b)x⁴=16

c)9^x-1=9                                         d)2^x:2⁵=1

Tim X

a) 2(x-51)=2.2³+20                   b)3²(x+4)-5²=5.5²

    Viet tap hop cac  chu so cua cac so.

a) 97542             b) 29635                         c)60000

a)Viet tap hop M cac so tu nhien lon hon 9, nho hon hoac bang 15 bang hai cach.

b)Viet tap hop A cac so tu nhien khong vuot qua 30 bang hai cach.

a) + em se thuong xuyen toi tham ba , tro chuyen voi ba.

    +giup ba thap huong tren ban tho anh hung liet si.

    +giup ba lam nhung viet trong nha va keu goi moi nguoi  trong xom toi giup do ba.

b) - Neu bo hoac me em chang may bi om, em rat buon nhung em se co gang hoc tap tot de bo me duoc vui va yen tam chua benh.

+giup ba me lam viec nha theo kha nang cua minh 

+tu lo cho ban than cua minh khong can ba me giup

+cham soc ba me nhu : nau chao cho ba me an ,...

Nam often .................his parents in the field on Sundays.

A.helps             B. help             C.is helping              D.helping

My best friend is kind and .............. He often makes me laugh.

A.funny               B.nice                      C.shy                        D.boring

Sang is .....................at chemistry than Susan.

A.good            B.well             C.better                    D.best

I lake to read " HOA HOC TRO " very much. It's my.............. magazine.

A.nice             B.quick               C.funny                D. favourite

An adult rhino weighs over 200 kilos and may (6).................. to be 50 years old.

A.lives            B.living                  C.to live                  D.lve

Each food (3)............ three toes. they usually walk very (4) ....................., but they can run at 50 kilometers (5)................. hour. Rhinos are usually quiet and calm animals and they only eat anh other plants.

3. A.there              B.have                     C.there are                D. has

4.A.slowly            B.slow                       C.slower                    D.slowest

5.A.a                    B.an                          C.the                          D.this