\(\frac{2}{5}.\frac{3}{4}+\frac{6}{15}:\frac{4}{9}.5=\frac{6}{20}+\frac{9}{10}.5=\frac{6}{20}.\frac{9}{2}=\frac{27}{20}\)

\(\frac{2}{5}\cdot\frac{3}{4}+\frac{6}{15}\cdot\frac{9}{4}\cdot5=\frac{3}{10}+\frac{45}{10}=\frac{48}{10}=\frac{24}{5}\)

p/s : tự quy đồng vs dấu "." là dấu nhân nhá

Write a personal account about something funny that has happened to you?

We all have something that goes wrong sometimes, something comical, something embarrassing so what is the funniest thing that ever happened to you when visiting the area

Ok here is mine. A few years ago we stayed in PF at one of the hotels along the river with a narrow parking lot between the river and our balcony. We were tired when we checked in and decided to just hang out in the room and rest for a while. Well as usual I had to go potty as soon as we walked in our room and I decide to just go ahead and strip off my clothes while I am in the potty. I come out of the potty and walk directly across to the luggage/closet area and open the suitcase to find something I can lounge around in well while I am bent over, mind you naked as a jaybird,looking through the suitcase I suddenly hear my husband scream my name and slam a door. He had gone out to the balcony to look at some brochures and rest a while and had left the door open unbeknownst to me. In the meantime someone had pulled in and backed into a parking spot so that they were now facing our room and he said they were just sitting there pointing and laughing and he could not figure out why and so he got up to come inside and then he said that was when he realized what all the laughter was about. The whole time there I was in all my glory rummaging through my suitcase oblivious to the fact that my butt was the butt of their joke! 

Có gì đó sai ở đây bạn ạ !

hinh nhu de sai roi bn oi

a) 16,2 x 3,7 +5,7 x 16,2 - 7,8 x4,8 - 4,6 x 7,8

=16 x (3,7+5,7) - 7,8 x (4,8 - 4,6)

=16 x 9,4 - 7,8 x 0,2

=150,4 - 1,56

=148,84

b)11,2 + 12,3 + 13,4 - 12,6 - 11,5 - 10,4

=23,5 + 13,4 - 12,6 - 11,5 - 10,4

=36,9 -12,6 - 11,5 - 10,4

=24,3 - 11,5 - 10,4

=12,8 - 10,4

=2,4

gạch chân _________________________ là phần nha

\(A=\left\{7;8;9;10;...;19\right\}\)

Số phần tử của tập hợp  \(A\)là :

\(\left(19-7\right)+1=13\)(phần tử )

\(A=\left\{7;8;9;10;11;12;13;14;15;16;17;18\right\}\)

- Số phần tử của A là : \(\left(18-7\right):1+1=12\)( phần tử )

=> A có 12 phần tử

Học tốt !

Số học sinh lớp 6A bằng \(\frac{2}{3}\div\frac{3}{4}=\frac{8}{9}\) số học sinh lớp 6B

Số học sinh lớp 6A là:

102 : ( 8 + 9 ) x 8 = 48 ( học sinh )

Số học sinh lớp 6B là:

102 - 48 = 54 ( học sinh )

6A : 48 học sinh

6B ; 54 học sinh

k mình đi ! Mình giải cho !

Chiều cao hình thoi bằng diện tích hình thoi chia cho cạnh nhé bạn.

khong

Lúc đầu đội đã mang số cây đi trồng là :

      600 : 75 x 100 = 800 ( cây )

            Đáp số : 800 cây

khi đó ta tìm 1% của số cây mang đi là 600:75=8 cây 

rồi ta tính số cây mang đi là 8x100=800 cây