Question

a) 7/19.8/11+3/11.7/19+-12/19

b)-1,6 .-15/32+(0,8 - 2 4/25(hon so) ) : 3 2/3

Answer 1

a)7/19.8/11+3/11.7/19+-12/19

=7/19.(8/11+3/11)+-12/19

=7/19.1+-12/19

=7/19+-12/19

=-5/19

Answer 2

a)

\(\dfrac{7}{19}\cdot\dfrac{8}{11}+\dfrac{3}{11}\cdot\dfrac{7}{19}+\dfrac{-12}{19}\\ =\dfrac{7}{19}\cdot\left(\dfrac{8}{11}+\dfrac{3}{11}\right)+\dfrac{-12}{19}=\dfrac{7}{19}\cdot1+\dfrac{-12}{19}=\dfrac{7}{19}+\dfrac{-12}{19}=\dfrac{5}{19}\)