Toán lớp 4: Một số nhân với 9 thì được kết quả là 62a3.Tìm số đó.Mọi người giải giiups mình nhé.

2 câu trả lời

Đáp án:

 Số đó là :  `679`

Giải thích các bước giải:

 => Ta có : `62a3 ⋮ 9  => (6 + 2 + a + 3) ⋮ 9` 

`=> a = 7` 

`<=> x xx 9 = 6213`

        `x         = 6273 : 9`

        `x        = 679`

`leminchau2909` 

Đáp án:

 Số đó là : `697`

Giải thích các bước giải:

Gọi số cần tìm là `x :`

Tổng các chữ số của số `62a3` là :

   `6+2+a+3 = 11+ a `

`=> a = 7` vì `11+7 = 18` chia hết cho `9`

`x xx 9 = 6273`

`x = 6273 : 9`

`x = 697`

Vậy `x = 697`

`#dpa`

Câu hỏi trong lớp Xem thêm
0 lượt xem
2 đáp án
51 phút trước

Exercise 1: Puts the verbs in brackets in the correct verb form. 1. I (think) ____________ that mountain-climbing is very dangerous. 2. My father (like) ____________ collecting stamps so much. 3. She (take) ____________ a lot of photos when she (go) ____________ on holidays. 4. I like drawing very much. My hobby is (paint) ____________. 5. My mother says when she (retire) ____________, she (go) ____________ back to her village to do the gardening. 6. ____________ your sister (like) (make) ____________ model in her free time? 7. My brother (promise) ____________ that he (give) ____________ me a nice doll on my birthday. 8. Duong says he loves horse-riding but he (not/ continue) ____________ this hobby from next year. 9. My aunt (play) ____________ the guitar once a week. 10. Don't worry. I (dance) ____________ with you next Sunday. Exercise 2: Choose the correct verb form or tense 1. I’m told you are ill. I hope you ________ better again. a. will feel b. feel c. are feeling d. don’t feel 2. ______ you ______ to school every morning? a. Does ... walk b. Do ... walk c. Will... walk d. Are ... walking 3. You needn’t wear your coat. It ________ cold today. a. will be b. won’t be c. doesn’t be d. is 4. Fire needs oxygen to burn. It ________ without oxygen. a. burns b. burn c. don’t burn d. doesn’t burn 5. We ________ swimming because it’s fun and good exercise. a. like b. are liking c. will like d. liked Exercise 3: Put the verb in brackets into the present simple or past simple 1. We _________ (go) to the beach last weekend. 2. My cousins _________ (not/ visit) us every weekend. 3. ___________ (your mum/ make) a chocolate yesterday? 4. I _______ (send) Jessica an email yesterday afternoon 5. The children always ______ (do) their homework yesterday afternoon. 6. Last year, I ___________ (travel) to Japan. 7. ___________ you ___________ (have) dinner last night? 8. He ___________ (arrive) from the airport at 8:00, ___________ (check) into the hotel at 9:00, and met the others at 10:00. 9. I ___________ (receive) three messages two minutes ago. 10. She ___________ (work) at the movie theater after school. 11. Yesterday she ___________ (go) to the cinema and ___________ (watch) a horror movie. 12. Carlos always ___________ (eat) spaghetti but two days ago he ___________ (eat) soup. 13. We seldom ___________ (drink) alcohol during the forenoon. 14. Somebody ___________ (take) the flowers from the graves in the morning 15. When ___________ your grandpa ___________ (come) home after war? 16. Some girls ___________ (not/ read) the book yesterday 17. When ___________ (be) they in London the last time? - I think in 2002 18. Why ___________ you ___________ (help) your brother with the homework? - Because he ___________ (be) rather lazy all the time 19. My dog sometimes ___________ (catch) a mouse and ___________ (bring) it to the front door

0 lượt xem
1 đáp án
59 phút trước