45Km nha bạn 

I couldn't do the test because it is was difficult.

=> I couldn't do the test because of its difficulty.

1.She is tired, more over => however, she has to finish her homework

2.who look for => after your children when you are away from home

3.my daughter likes watching cartoon films, and so do => does my son

4.Although => Because i liked the sweater, I decided to buy it

5 .I have not finished to => X decorate the chrismas tree yet

6/We suggest planting more trees along the strees have => to have more shades and fresh air

7.peter is trying to study hardly => hard to prepare for the exem

8.how about to share => sharing the cost of accommodation

9.are you interesting => interested in learning foreign languages

10.despite => Although i did not like the sweater, i decided to buy it

11.would you like visiting => to visit the museum with us

12.He watched => was watching TV when somebody knocked at the door

13,He couldn't sleep so he turned off => on the TV to watch some programs

14 she is out of work now, therefore, she is looking after => for any jobs in the city

Chiều rộng nền nhà hình chữ nhật là :

       8 x 3/4 = 6 ( m )

Diện tích nền nhà hình chữ nhật là :

       8 x 6 = 48 ( m² )

Đổi 48 m² = 4800 dm²

Diện tích viên gạch hình vuông là :

       4 x 4 = 16 ( dm² )

Để lát nền nhà hình chữ nhật cần số viên gạch là :

       4800 : 16 = 300 ( viên gạch )

Lát cả nền nhà thì hét số tiền mua gạch là :

       300 x 20 000 = 6 000 000 ( đồng )

              Đáp số : 6 000 000 đồng

đáp số:-2018

tổng của các số trên

1+2+3+4+5+6+7+8+9 = 45

đáp số 45

tích mik mik tích lại

1+2+3+4+5+6+7+8+9=(1+9)+(2+8)+(3+7)+(4+6)+5

                                =10    +10    +10    + 10   +5

                                =     20         +     20        +5

                                =                 40                +5

                                =45