\(16\cdot17-\dfrac{5}{16}\cdot16+11\\ =16\cdot\left(17-\dfrac{5}{16}\right)+11\\ =16\cdot\dfrac{267}{16}+11\\ =267+11=278\)

\(\dfrac{2}{5}+x=\dfrac{2}{7}\\ x=\dfrac{2}{7}-\dfrac{2}{5}\\ x=\dfrac{-4}{35}\)

\(\dfrac{3}{4}+\dfrac{1}{2}+\left(\dfrac{-3}{32}\right)=\\ \dfrac{24}{32}+\dfrac{16}{32}+\left(\dfrac{-3}{32}\right)\\ =\dfrac{37}{32}\)

số phần trăm của kg gạo sau khi bán là : 
100% - 25% - 30% = 45%
a) số kg gạo lúc đầu là : \(4095\div\dfrac{45}{100}=9100\) (kg)

b) số kg gạo ngày đầu cửa hàng bán đc là : 

9100 x 25% = 2275 (kg)

số kg gạo ngày 2 cửa hàng bán đc là : 

9100 x 30% = 2730 (kg)

a) diện tích hình thang là : 
30 : 2 x 5 = 75 (m²)
b) diện tích trồng rau là : 
75 x 70% = 52,5 (m²)
diện tích trồng hoa là : 
75 - 52,5 = 22,5 (m²)
đáp số : 22,5 m²

\(\left(\dfrac{1}{2}\right)^{12}=\dfrac{1}{4096};\left(\dfrac{1}{3}\right)^9=\dfrac{1}{19683}\\ \Rightarrow\dfrac{1}{4096}>\dfrac{1}{19683}\\ \Rightarrow\left(\dfrac{1}{2}\right)^{12}>\left(\dfrac{1}{3}\right)^9\)

play / in / often / I / the / afternoon / volleyball
=> i often play volleyball in the afternoon
does / how / she / talk / her / to / friend / online / often /  ?
=> how often does she talk to her friend online ?
go / did / for / you / where / holiday / a picnic / ?
=> where did you go for a picnic on holiday ?
hometown / she / her / went / by / car / to
=> she went to her hometown by car / she went to hometown by her car
birthday / I /  went / to / my / mai s / party / yesterday
=> i went to mai's birthday birthday party yesterday
will / be / this / where / you / week ? 
=> where will you be this week ?
in / I / I LL / think / the / mountains / be
=> i think he i'll be in the mountains
do / what / you / ha long bay / will / at / ?
=> what will you do at halongbay

bbuer
=> burbe
sonsels
=> sonless
daywdenes
=> wednesday
eakbr 
=> break
ecno
=> once
eciwt
=> twice