The second bucket has liters of water :

    40 + 15 = 55 ( l )

                Answer : 55 ( l )

The smallest two-digit number is : 10 ( ten )

Sum of two numbers : 56 + 10 = 66 ( sixty- six )

9 . The house ( catch ) __was_catching___ fire while they were sleeping .

  did/ do/ mother/  What/ last/ in/ 's/ often/ Lan/ summer/?

⇒ What did Lan's mother often do in last summer ?

Dịch :

My wishes come true : mong muốn của tôi trở thành sự thật

( Bạn viết sai chữ " wihes " phải là " wishes " nhé ☺

a ) \(A=\sqrt{\left(2-\sqrt{3}\right)^2}+2\sqrt{3}\)

= \(|2-\sqrt{3}|+2\sqrt{3}\)

= \(2-\sqrt{3}+2\sqrt{3}\)

= \(2+\sqrt{3}\)

b ) \(B=\sqrt{18}-2\sqrt{50}+3\sqrt{8}+\sqrt[3]{27}\)

= \(3\sqrt{2}-2.5\sqrt{2}+3.2\sqrt{2}+3\)

= \(3\sqrt{2}-10\sqrt{2}+6\sqrt{2}+3 \)

= \(-\sqrt{2}+3\)

c ) \(C=\dfrac{4}{\sqrt{5}-1}-\dfrac{10}{\sqrt{5}}+\dfrac{\sqrt{125}}{\sqrt{5}}+\sqrt{2}.\sqrt{\dfrac{5}{2}}\)

= \(\dfrac{4.\left(\sqrt{5}+1\right)}{\sqrt{5}^2-1^2}-\dfrac{10\sqrt{5}}{\sqrt{5}^2}+\sqrt{\dfrac{125}{5}}+\sqrt{2.\dfrac{5}{2}}\)

= \(\dfrac{4.\left(\sqrt{5}+1\right)}{4}-\dfrac{10\sqrt{5}}{5}+\sqrt{25}+\sqrt{5}\)

= \(1+\sqrt{5}-2\sqrt{5}+5+\sqrt{5}\)

= 6