Question

a)-4/11+5/6+7/11-5/6

b)-5/6.7/13+19/13.6/-5+2/5

c)3/7.(-0,5+3/2)-2/7:25%

mọi người giúp e vs ạ

e cần gấp

Answer 1

a; - \(\dfrac{4}{11}\) + \(\dfrac{5}{6}\) + \(\dfrac{7}{11}\) - \(\dfrac{5}{6}\)

= (-\(\dfrac{4}{11}\) + \(\dfrac{7}{11}\)) + (\(\dfrac{5}{6}\)  - \(\dfrac{5}{6}\))

= - \(\dfrac{3}{11}\) + 0

= - \(\dfrac{3}{11}\)

Answer 2

b; -\(\dfrac{5}{6}\).\(\dfrac{7}{13}\) + \(\dfrac{19}{13}\).\(\dfrac{6}{-5}\) + \(\dfrac{2}{5}\)

= - \(\dfrac{35}{78}\) - \(\dfrac{114}{65}\) + \(\dfrac{2}{5}\)

= - \(\dfrac{859}{390}\) + \(\dfrac{2}{5}\)

= - \(\dfrac{703}{390}\)

Answer 3

c; \(\dfrac{3}{7}\).(-0,5 + \(\dfrac{3}{2}\)) -\(\dfrac{2}{7}\) : 25%)

= \(\dfrac{3}{7}\).1 - \(\dfrac{8}{7}\)

= \(-\dfrac{5}{7}\)