6735 + 6 = 6741

Số sách học sinh là :

12000 x 50% =6000 (cuốn)

Số sách còn lại là :

12000-6000=6000(cuốn)

Số sách truyện là :

6000 x 2/3 =4000(cuốn)

Số sách tham khảo là:

6000-4000=2000(cuốn)

Đ/S........

đổi 1 giờ 45 phút =1.75 giờ

người đó làm 5 sản phẩm hết số thời gian là:

1.75x5=8.75 giờ 

đáp số 8.75 giờ

A=4+2^2+2^3+2^4+...+2^20

4A=2^2+2^3+2^4+...+2^20+2^21

4A-A=2^21-4

3A=2^21-4

A=( 2^21-4 ) : 3

Mình làm đúng nhưng cũng có thể làm sai???

Đây ko phải nơi bạn hỏi mấy cái đó

                                    Giải

                 Số cần tìm là :

                                   10*10*1=100

                                              Đáp số:100

                                   Duyệt nha.......@...........

gọ số cần tìm là abc ta có:

abc-900=ed

=> a=9

ta có:

a+b+c=19

9+b+c=19

=> b+c=10

để abc lớn nhất có thể => b p lớn hơn c=> b=9 cong c=1

=> số cần tìm là 991

mong các bn giúp mk nka

Nghe An Province was badly affected again when a typhoon hit the area last night. The storm began at around 11 p.m. and raged thoughout the night. Dozens of people were seriously injured and hundreds of others were left homeless. The severe winds caused extensive damage to property, including homes and businesses, particularly in Cua Lo, a coastal town in Nghe An. The storm had already weakened by the time emergency workers arrived in the area. Rescue operations have started and many people trapped in collapsed or damaged buidings have been freed. Workers are now clearing up the debris left behind by the severe storm. The government has already sent rescue equipment to Nghe An, as well as food and medical supplies. People left homeless have been taken to safe areas, where temporary accommodation will be built to house them. The weather bureau has issued flood warning for Nghe An and nearby provinces as heavy rain is expected to continue over the next few days.