Question

Tính: 3/4 -[(-5/3) - (1/12+ 2/9)

Answer 1

\(\dfrac{3}{4}-\left[\left(-\dfrac{5}{3}\right)-\left(\dfrac{1}{12}+\dfrac{2}{9}\right)\right]\)

\(=\dfrac{3}{4}-\left[\left(-\dfrac{5}{3}\right)-\left(\dfrac{9}{108}+\dfrac{24}{108}\right)\right]\)

\(=\dfrac{3}{4}-\left[\left(-\dfrac{5}{3}\right)-\dfrac{11}{36}\right]\)

\(=\dfrac{3}{4}-\left[-\dfrac{60}{36}-\dfrac{11}{36}\right]\)

\(=\dfrac{3}{4}-\dfrac{-71}{36}\)

\(=\dfrac{27}{36}-\dfrac{-71}{36}\)

\(=\dfrac{49}{18}\)

Answer 2

\(\dfrac{3}{4}-\left[\left(-\dfrac{5}{3}\right)-\left(\dfrac{1}{12}+\dfrac{2}{9}\right)\right]=\dfrac{3}{4}-\left[-\dfrac{5}{3}-\dfrac{1}{12}-\dfrac{2}{9}\right]=\dfrac{3}{4}-\left(-\dfrac{71}{36}\right)=\dfrac{49}{18}\)