số trang đã đọc là : 210 : (3+7 ) x 7 = 147 ( trang )

số trang chưa đọc là : 210 - 147 = 63 ( trang )

tick nhé

mọi người tích đi

ta có :

vậy người ta dùng : \(276-180-9=87\) để đánh các trang có 3 chữ số

vậy số trang của quyển sách là : \(87:3+100-1=128\text{ trang}\)

vậy An cần đọc thêm 128 -65 =63 trang nữa để hết quyển sách

Dễ mà , bây h làm thế này:

An còn phải đọc số trang để hết cuốn sách là:

 276 - 65 = 211 (trang)

Đáp số : 211 trang

Đọc kĩ rồi hẵn hỏi nha!

                                                                                                 ~ Học tốt ~

According to the CNET technology website, Lloyd's List, which was launched in London in 1734, has announced that it will stop publishing print publications beginning in December. Lloyd's List is rated as the world's leading newspaper in the shipping industry. The editorial staff of Lloyd's List said the need for readers to change has forced the newspaper to redirect. Recent surveys show that less than 2% of Lloyd's List's loyal readers read the paper. Currently, the newspaper publishes more than 60,000 copies a day.

"The vast majority of our readers have picked the electronic edition - editor Richard Meade says - Electronic models bring new revenue streams and new opportunities to improve information services in the direction of updating. every hour, every minute ". The decision by Lloyd's List, the world's oldest newspaper, shows the difficulties faced by Western newspapers.

In the past 10 years, print and print advertising sales in the West have been steadily declining due to the rise of online newspapers. In March 2009, the Seattle Post-Intelligencer newspaper ceased publication. A month later Christian Science Monitor turns up. Popular magazines such as Newsweek and US News & World Report also made the same decision.

The world's oldest paper newspaper turned online

According to the CNET technology website, Lloyd's List, which was launched in London in 1734, has announced that it will stop publishing print publications beginning in December. Lloyd's List is rated as the world's leading newspaper in the shipping industry. The editorial staff of Lloyd's List said the need for readers to change has forced the newspaper to redirect. Recent surveys show that less than 2% of Lloyd's List's loyal readers read the paper. Currently, the newspaper publishes more than 60,000 copies a day.

 
"The vast majority of our readers have picked the electronic edition - editor Richard Meade says - Electronic models bring new revenue streams and new opportunities to improve information services in the direction of updating. every hour, every minute ". The decision by Lloyd's List, the world's oldest newspaper, shows the difficulties faced by Western newspapers.

In the past 10 years, print and print advertising sales in the West have been steadily declining due to the rise of online newspapers. In March 2009, the Seattle Post-Intelligencer newspaper ceased publication. A month later Christian Science Monitor turns up. Popular magazines such as Newsweek and US News & World Report also made the same decision.

The world's oldest paper newspaper turned online

According to the CNET technology website, Lloyd's List, which was launched in London in 1734, has announced that it will stop publishing print publications beginning in December. Lloyd's List is rated as the world's leading newspaper in the shipping industry. The editorial staff of Lloyd's List said the need for readers to change has forced the newspaper to redirect. Recent surveys show that less than 2% of Lloyd's List's loyal readers read the paper. Currently, the newspaper publishes more than 60,000 copies a day.

 
"The vast majority of our readers have picked the electronic edition - editor Richard Meade says - Electronic models bring new revenue streams and new opportunities to improve information services in the direction of updating. every hour, every minute ". The decision by Lloyd's List, the world's oldest newspaper, shows the difficulties faced by Western newspapers.

In the past 10 years, print and print advertising sales in the West have been steadily declining due to the rise of online newspapers. In March 2009, the Seattle Post-Intelligencer newspaper ceased publication. A month later Christian Science Monitor turns up. Popular magazines such as Newsweek and US News & World Report also made the same decision.

59 nhà ah?

đ thì k nhé

1. Tìm x : 
420 : [75 - (x - 10 ) = 21
=> 75 - ( x - 10 ) = 420 : 21
=> 75 - ( x - 10 ) = 20 
=> x - 10 = 75 - 20 
=> x - 10 = 55 
=> x = 55 + 10 = 65 
=> Vậy x = 65 
2.           _ Giải 
Tổng số tuổi của bố và Nam là :
108 : ( 5 + 4 ) x 4 = 48 ( tuổi ) 
Tuổi của ông là :
108 - 48 = 60 ( tuổi ) 
Tuổi bố là : 
48 : ( 3 + 1 ) x 3 = 36 ( tuổi ) 
Tuổi Nam là : 
48 - 36 = 12 (tuổi )
Đáp số :  Ông : 60 tuổi 
              Bố    : 36 tuổi
              Nam : 12 tuổi 
3... 

4...
5. 

Toán tổng tỉ : 

Theo đề bài ta có : Tổng số phần bằng nhau là : 

6 + 1 + 2 + 2 = 11 ( phần ) 
Giá trị một phần là : 
55 : 11 = 5 ( quyển ) 
Số sách của Chiến là : 
5 x 1 = 5 ( quyển )
Số sách của Thắng là : 

5 x 6 = 30 ( quyển ) 
Số sách của Việt là :
5 x 2 - 5=  5 ( quyển ) 
Số sách của Nam là : 

5 x 2 + 5 = 15 (quyển)

Đáp số : 
 *Chiến 5 quyển

*Thắng: 30 quyển

*Việt: 5 quyển 

*Nam : 15 quyển 


 

Quyển sách có 221 trang nên Hồng phải đánh 221 trang.
 

Từ 1 -> 9 có số chữ số là :

( 9 - 1 ) : 1 + 1 = 9 ( số ) => 9 x 1 = 9 ( chữ số )

Từ 10 -> 99 có số chữ sô là :

( 99 - 10 ) : 1 + 1 = 90 ( số ) => 90 x 2 = 180 ( chữ số )

Từ 100 -> 221 có số chữ số là :

( 221 - 100 ) : 1 + 1 = 122 ( số ) => 122 x 3 = 366 ( chữ số )

Từ 1 đến 221 cần số chữ số la :

366 + 180 + 9 = 555 ( chữ số )

Đáp số 555 chữ số

59 bạn nha!^^

k mk nhé!

tỏng số viên bi của 2 túi là:

35+24=59(viên bi)

Nếu bn thấy đúng thì tk cho mk vs nha

số thứ nhất bằng : 1=1+2x0

số thứ ba bằng : 3=1+2x1