Question

thực hiện phép tính 

a. 2 phần 3 -4(1 phần 2 + 3 phần 4)

    

Answer 1

\(\dfrac{2}{3}-4\left(\dfrac{1}{2}+\dfrac{3}{4}\right)\\ =\dfrac{2}{3}-4.\dfrac{2+3}{4}\\ =\dfrac{2}{3}-4.\dfrac{5}{4}\\ =\dfrac{2}{3}-5\\ =\dfrac{2-15}{3}\\ =\dfrac{-13}{3}\)

Answer 2

`a)2/3-4(1/2+3/4)`

`=2/3-4*1/2-4*3/4`

`=2/3-2-3`

`=2/3-5`

`=2/3-15/3`

`=-13/3`