Question

am nevoie urgent . !DAU COROANĂ!​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

$\it a) \dfrac{1}{4}\cdot3+\dfrac{11}{4}=\dfrac{1}{4}(3+11)=\dfrac{1}{4}\cdot14=\dfrac{14^{(2}}{4}=\dfrac{7}{2}=3,5\\ \\ \\ b)\ \dfrac{1}{13}\cdot\dfrac{1}{5}+\dfrac{1}{13}\cdot\dfrac{1}{8}=\dfrac{1}{13}\Big(\dfrac{^{8)}1}{5}+\dfrac{^{5)}1}{8}\Big)=\dfrac{1}{\not13}\cdot\dfrac{\not13}{40}=\dfrac{1}{40}\\ \\ \\c)\ \dfrac{1}{9}\cdot24-\dfrac{1}{18}\cdot24=\dfrac{1}{9}(24-\dfrac{24}{2})=\dfrac{1}{9}\cdot12=\dfrac{\ 12^{(3}}{9}=\dfrac{4}{3}$

$\it d) \dfrac{1}{5}\cdot\dfrac{1}{6}-\dfrac{1}{5}\cdot\dfrac{1}{15}=\dfrac{1}{15}\Big(\dfrac{^{5)}1}{\ 2}-\dfrac{^{2)}1}{\ 5}\Big)=\dfrac{1}{15}\cdot\dfrac{3}{10}=\dfrac{\ 3^{(3}}{150}=\dfrac{1}{50}$