Question

Answer 1

16A 

II. Tự luận 

Câu 1:

a) \(\left(7,2-2,1\right)\cdot0,1+\left(-3\right)^2\)

\(=5,1\cdot0,1+9\)

\(=0,51+9\)

\(=9,51\)

b) \(\dfrac{1}{5}:\dfrac{1}{10}-\dfrac{1}{3}\cdot\left(\dfrac{6}{5}-\dfrac{9}{4}\right)\)

\(=\dfrac{1}{5}\cdot10-\dfrac{1}{3}\cdot\left(\dfrac{24}{20}-\dfrac{45}{20}\right)\)

\(=2-\dfrac{1}{3}\cdot\dfrac{-21}{20}\)

\(=2+\dfrac{7}{20}\)

\(=\dfrac{47}{20}\)