-145-(18-145) 

= -145 - 18 + 145 

= -18

b ) 217 + [ 43 + ( -217 ) + (-23 )

= 217 + ( 43 - 217 - 23 )

= 217 - 197

= 20

bài 3

a ) \(x-12=\left(-9\right)+\left(-15\right)\)

\(x-12=-9-15\)

\(x-12=-24\)

\(x=-12\)

b) 18-x = 11 - ( -24 )

câu nài mik bỏ nhóe :) xl 

nhưng HT

Bài 2

a) -145-(18-145)                          

=-145-18+145

=(-145+145)-18

=0-18

=-18

b)217+[43+(-217)+(-23)]

=217+43+(-217)+(-23)

=217+43-217-23

=(217-217)+(43-23)

=0+20

=20

Bài 3

a) x-12=(-9)+(-15)

x-12=-23

x=-23-12

x=-35

b)18-x=11-(-24)

18-x=35

x=18-35

x=-17

~HT~

0,5,3 15

bay cho toi caii đi 

đáp án là 3/4

Chúc bạn học tốt !!!

3/4 nha bạn

??????????

Ủa gì vậy, đề bài là gì?

a) ƯCLN = 2^{2 .}  7= 4.7 = 28

b) ƯCLN= 2

c)ƯCLN= 2² . 3. 5 = 60

36 nhé bn

Câu 8: Cho hình chữ nhật ABCD có AB = 16 cm, BC = 12 cm, BD = 20 cm. Gọi O là giao  điểm của AC và BD. Tính chu vi tam giác OCD? 

A. 56 cm 

B. 52 cm 

C. 36 cm 

D. Không thể xác định được 

hỏi ít thôi bạn êy

16. Parents give children _________at Tet. A. lucky money B. lanterns C. moon cakes D. gifts

17. People use blossoms to _______their house at Tet. A. clean B. buy C. decorate D. start

18. You can watch models showing new forms of clothes in ________. A. talent show B. fashion show C. music performance D. food stand

 19. You can watch people sing or play music in _________. A. talent show B. fashion show C. music performance D. food

20. What do people do during Thanks Giving? They ______________ A. wear traditional clothes B. give gifts C. eat mooncakes D. watch parades

Exercise 1. Mark the letter A, B, C, or D to indicate the correct answer to each of the II. VOCABULARY

following questions.

11. My mother begins cleaning and _________ the house for Tet A. decorating B. parading C. visiting D. buying

12. In spring, we grow different kinds of ________in our garden. A. flowers B. candy C. lucky money D. fireworks

13. Japan is beautiful in April when all the trees are in___________. A. food stand B. blossom C. fashion show D. puppet show

14. I don’t believe that the __________can bring us good or bad luck. A. game show B. clothes C. rubbish D. first footer

15. We celebrate Tet on the 1st day of January according to lunar ________. A. lion dance B. resolution C. calendar D. lanterns

lỗi đề à bạn ê câu đầu tiên kìa

ko lỗi(đợi tí để mn làm)

I. PHONES Exercise 1. Exercise 2. Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

1. A. positive B. negative C. tug D. future 2. A. puppet B. funny C. schedule D. sunny 3. A. milk-shake B. fashion C. talent C. candy 4. A. opens B. closes C. leaves D. ends

5. A. celebrates B. needs C. books D. points