Question

Tính:

2/3 - 4 x(1/2+3/4)

Answer 1

\(\dfrac{2}{3}\) - 4 x (\(\dfrac{1}{2}\)+\(\dfrac{3}{4}\))

=\(\dfrac{2}{3}\)-4 x\(\dfrac{5}{4}\)=\(\dfrac{2}{3}\)-5=\(\dfrac{-13}{3}\)

KL:...

Answer 2

Ta có: \(\dfrac{2}{3}-4\left(\dfrac{1}{2}+\dfrac{3}{4}\right)\)

\(=\dfrac{2}{3}-4\cdot\dfrac{5}{4}\)

\(=\dfrac{2}{3}-\dfrac{15}{3}=\dfrac{-13}{3}\)