Bạn chưa đăng nhập. Vui lòng đăng nhập để hỏi bài

Những câu hỏi liên quan
nguyễn văn an
Xem chi tiết
Băng Dii~
18 tháng 10 2016 lúc 15:50

gọi số cần tìm là abcd .

ta có :

ab + 1188 = abcd

ab + 1188 = ab x 100 + cd

1188 + cd = ab x 99

suy ra ab = 12

và cd = 00

đ/s : 1200

nhé ! 

QuocDat
18 tháng 10 2016 lúc 15:50

Gọi số phải tìm là abcd. Xoá đi chữ số hàng chục và hàng đơn vị ta được số ab

Theo đề bài ta có : abcd – ab = 4455 

100 x ab + cd – ab = 4455

cd + 100 x ab – ab = 4455 

cd + 99 x ab = 4455

cd = 99 x (45 – ab) 

Ta nhận xét tích của 99 với 1 số tự nhiên là 1 số tự nhiên nhỏ hơn 100. Cho nên 45 – ab phải bằng 0 hoặc 1. 

- Nếu 45 – ab = 0 thì ab = 45 và cd = 0. 

- Nếu 45 – ab = 1 thì ab = 44 và cd = 99.

Số phải tìm là 4500 hoặc 4499

OoO_Nhok_Lạnh_Lùng_OoO
1 tháng 8 2017 lúc 21:19

Ta có 1188 + ab= abcd

Nếu ờ hàg chục là phép cộg k nhớ thì ab = 11, suy ra cd là 99. Số 1199.

Nếu ở hàg chục là phép cộg có nhớ thì ab = 12, suy ra cd là 00. Số 1200

Nguyễn Hà Linh
Xem chi tiết
Nguyễn Hà Linh
29 tháng 6 2016 lúc 20:44

các bạn giúp mình giải nha.mình xin cảm ơn các bạn đã giúp mình

SKT_Rengar Thợ Săn Bóng...
29 tháng 6 2016 lúc 20:45

bạn vào câu hỏi tương tự nha !!!!!!!!!!!!

nguyễn tuấn anh
Xem chi tiết
Diệu Anh
7 tháng 12 2018 lúc 18:15

xóa chữ số hđv thì số đó giảm 10 lần

số ban đầu là: 1188:(10-1)=132

đáp số:...

mk nghĩ bài này chỉ tìm dc số có 3 chữ số thôi, k mk nhé

Nguyễn Minh Quân
7 tháng 12 2018 lúc 18:58

16383

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Đỗ Thị Thúy Nga
11 tháng 12 2018 lúc 6:22

bạn muốn chép trên này hả Nguyễn Tuấn Anh lớp 5a ?

Khách vãng lai
Xem chi tiết
nguyen lan anh
Xem chi tiết
Trùm Trường
1 tháng 7 2016 lúc 11:30

 Gọi các chữ số hàng nghìn , trăm , chục , đơn vị lần lượt là abcd

Theo đề bài ta có:abcd = 1188+ab

Trong phép cộng, khi cộng 2 chữ số trong cùng một hàng thì có nhớ nhiều nhất là 1 nên ab chỉ có thể là 11 hoặc 12 

Nếu ab = 11 thì abcd =1188 + 11 = 1199

Nếu ab = 12 thì abcd = 1188 + 12 = 1200

Vậy ta tìm đc 2 số thỏa mãn đề bài là : 1199 và 1200

Đs:1199 và 1200

Nhớ k mk nhe!!!

Hi 5
Xem chi tiết
Tạ Thái Bảo
Xem chi tiết
Nguyễn Ngọc Anh Minh
26 tháng 10 2023 lúc 8:32

Gọi số cần tìm là \(\overline{abcd}\) Theo đề bài

\(\overline{abcd}-\overline{ab}=1188\)

\(\Rightarrow100x\overline{ab}+\overline{cd}-\overline{ab}=1188\)

\(\Rightarrow99x\overline{ab}=1188-\overline{cd}\) (1)

Ta có

\(99x\overline{ab}⋮99\Rightarrow1188-\overline{cd}⋮99\)

Mà \(1188⋮99\Rightarrow\overline{cd}⋮99\Rightarrow\overline{cd}=0\)  hoặc \(\overline{cd}=99\)

+ Với \(\overline{cd}=0\) thay vào (1) \(\Rightarrow99x\overline{ab}=1188\Rightarrow\overline{ab}=1188:99=12\)

\(\Rightarrow\overline{abcd}=1200\)

+ Với \(\overline{cd}=99\) thay vào (1) \(\Rightarrow99x\overline{ab}=1188-99\Rightarrow\overline{ab}=11\)

\(\Rightarrow\overline{abcd}=1199\)

 

 

Tạ Thái Bảo
Xem chi tiết
Nguyễn Bảo Ngọc
25 tháng 10 2023 lúc 21:48

gọi số cần tìm là abcd,ta có :

ab + 1188 = abcd

ab + 1188 = ab x 100 + cd

1188 + cd = ab x 99

suy ra ab = 12

và cd = 00

Vậy số đó = 1200

Học vv!

Nguyễn Thị Thu Hà
Xem chi tiết
Lê Minh Đức
19 tháng 2 2016 lúc 21:00

 Ta có 1188 +ab= abcd(đặt tính theo cột dọc nha).

Nếu ờ hàg chục là phép cộg k nhớ thì ab = 11, suy ra cd là 99.

Số 1199. Nếu ở hàg chục là phép cộg có nhớ thì ab = 12, suy ra cd là 00. Số 1200