Bạn chưa đăng nhập. Vui lòng đăng nhập để hỏi bài
Nguyễn Ngọc Minh Thư

Tìm tổng của tất cả các số chẵn có bốn chữ số khi chia cho 5 dư 2.

trieu phuong anh
3 tháng 1 2017 lúc 18:52

Số chẵn lớn nhất có 4 chữ số chia 5 dư 2 là:9992

Số chẵn bé nhất có 4 chữ số chia 5 dư 2 là:1002

số các số chia 5 dư 2 là:

(9992-1002):10+1=900 (số)

tổng của các số đó là:

(9992+1002)x900:2=4947300

đúng 100% luôn

Băng Dii~
3 tháng 1 2017 lúc 18:55

Chia 5 dư 2 có tận cùng là 2 hoặc 7

Nhưng vì là số chẵn nên tận cùng sẽ là 2 . 

Số bé nhất có 4 chữ số thỏa mãn : 1002

Số lớn nhất có 4 chữ số thỏa mãn : 9992

Số số thỏa mãn :

( 9992 - 1002 ) : 10 + 1 = 900 ( số )

Tổng các số đó :

( 9992 + 1002 ) x 900 : 2 = 4 947 300

đ/s: ....

lê hồng anh
3 tháng 1 2017 lúc 18:56

                      GIẢI

các số chẵn có 4 chữ số chia cho 5 dư 2 lần lượt là : 1002 ; 1012 ; ... ; 9992.

có số số chẵn là :

         ( 9992 - 1002 ) : 10 + 1 = 900

tổng là :

        ( 9992 + 1002 ) x 900 : 2 = 4947300 

                         đáp số : 4947300

Lãnh Hạ Thiên Băng
3 tháng 1 2017 lúc 18:58

Chia 5 dư 2 có tận cùng là 2 hoặc 7

Nhưng vì là số chẵn nên tận cùng sẽ là 2 . 

Số bé nhất có 4 chữ số thỏa mãn : 1002

Số lớn nhất có 4 chữ số thỏa mãn : 9992

Số số thỏa mãn :

( 9992 - 1002 ) : 10 + 1 = 900 ( số )

Tổng các số đó :

( 9992 + 1002 ) x 900 : 2 = 4 947 300

Lê Ngọc Anh Thư
3 tháng 1 2017 lúc 21:29

100%la 4947300

✓ ℍɠŞ_ŦƦùM $₦G ✓
3 tháng 1 2017 lúc 21:37

Số chẵn lớn nhất có 4 chữ số khi chia cho 5 dư 2 là: 9992

Số chẵn bé nhất có 4 chữ số khi chia cho 5 dư 2 là: 1002

Số các số chẵn có 4 chữ số khi chia cho 5 dư 2 là:

( 9992 - 1002 ) : 10 + 1 = 900 ( số hạng )

Tổng của tất cả các số chẵn có 4 chữ số khi chia cho 5 dư 2 là:

( 9992 + 1002 ) x 900 : 2 = 4947300

Đáp số: 4947300

✓ ℍɠŞ_ŦƦùM $₦G ✓
4 tháng 1 2017 lúc 7:08

Mình làm đúng đó

Đảm bảo 100%

Bài này mình làm rồi cô chữa đúng y hệt

nha mọi người

Lê Ngọc Anh Thư
4 tháng 1 2017 lúc 17:18

4947300

minh chac luon minh thi violympic roi

vu van dung
5 tháng 1 2017 lúc 16:09

4947300. Đúng 1000000000000000000000000000000000000%luôn

Nguyễn Ngọc Minh Thư
8 tháng 1 2017 lúc 18:43

cảm ơn các bạn !

thanksssssssss!

kuroba kaito
8 tháng 1 2017 lúc 21:14

4947300 do ban

h minh  nha

Đỗ Quang Vinh
10 tháng 1 2017 lúc 21:01

 = 4947300 nha

tk cho mình nha

THANKS YOU

Trần Nhật Tiến
16 tháng 1 2017 lúc 8:08

dung 100 % 4947300 minh thi roi

Nguyễn Ngọc Minh Thư
16 tháng 1 2017 lúc 18:39

cảm ơn các bạn nhe !

TTTTTTTTTTHHHHHHHHHHAAAAAAAAAAKKKKKKKKKKSSSSSSSSSS!

Nguyễn Ngọc Minh Thư
16 tháng 1 2017 lúc 18:47

4947300 là đúng nhất

Mình bảo đảm với các 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phạm việt anh
16 tháng 1 2017 lúc 20:45

bạn hãy chọn vào số  497300 nhé

phi van dat
17 tháng 1 2017 lúc 19:55

4947300 nhà đồ ngu

thank

nhớ kích cho tao

Kumuddexe
17 tháng 1 2017 lúc 20:37

sao làm thế số 0

Nguyễn Khang
17 tháng 1 2017 lúc 20:46

4947300 đúng 100% đó. nha!

lộc
19 tháng 1 2017 lúc 19:16

4947300

đúng 100000000000000000000000000000000000% luôn

lộc
19 tháng 1 2017 lúc 19:18

4947300

mình thi trên violympic rồi 

Đoàn Ngọc Linh
24 tháng 1 2017 lúc 10:47

494300 bạn yêu quý nhé

tớ làm trong violympic rồi

chúc bạn một năm mới vui vẻ nhé

Nguyễn Yến Phương
24 tháng 1 2017 lúc 14:52

4947300 mik làm trong violympic tuy làm ko được 300 nhưng câu này mik đúng

Nguyễn Hoàng Thu Trang
1 tháng 2 2017 lúc 21:53

4947300

lộc
4 tháng 2 2017 lúc 14:18

4947300

Hoàng Nguyễn Hiếu Ngân
6 tháng 2 2017 lúc 20:57

minh ko chiu tinh nen yoan nen day de COPPY

pham thanh tuan
7 tháng 2 2017 lúc 19:49

4947300

barbie
21 tháng 2 2017 lúc 12:39

đáp án đúng là 4947300 đó nha 

shizuka
22 tháng 2 2017 lúc 15:32

4947300 đúng 100% luôn

Duy An
25 tháng 2 2017 lúc 18:05

kết quả là 947300

trên violympic mình làm rồi


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