Question

B1: Tính

a) (1 - \(\dfrac{2}{3}\) - \(\dfrac{1}{4}\)) : (2 - \(\dfrac{4}{3}\) - \(\dfrac{4}{5}\))

b) \(\dfrac{3}{4}\) . \(\dfrac{5}{9}\) + \(\dfrac{6}{7}\) : \(\dfrac{4}{3}\) - (\(1\dfrac{2}{5}\) : \(1\dfrac{1}{3}\))

c) ( 3 - \(\dfrac{13}{12}\) + \(\dfrac{2}{3}\) ) : ( \(\dfrac{-1}{12}\) - 2 + \(1\dfrac{1}{2}\) )

Answer 1

a: =((12-8-3)/12):(30-20-12)/15

=-5/8

b: =3/4(5/9+6/7)-7/5:4/3

=3/4(5/9+6/7-7/5)

=1/105

d: =(36/12-13/12+8/12):(-1/12-24/12+36/12)

=31/12:11/12=31/11