Question

Urgentă am nevoie de ajutor!

Answer 1

Răspuns: Ai rezolvarea mai jos

Explicație pas cu pas:

Buna!

$\large\bf 4.~a)~~ \dfrac{5}{8} \cdot \dfrac{3}{7} \cdot \dfrac{4}{9}=\dfrac{5}{\not8} \cdot \dfrac{\not3}{7} \cdot \dfrac{\not4}{\not9}=\dfrac{5}{2} \cdot \dfrac{1}{7} \cdot \dfrac{1}{3}= \boxed{\large\bf \dfrac{5}{42}}$

$\large\bf4.~b)~~ \dfrac{1}{9} \cdot \dfrac{2}{5} \cdot \dfrac{18}{7}= \dfrac{1}{\not9} \cdot \dfrac{2}{5} \cdot \dfrac{\not18}{7}=\dfrac{1}{1} \cdot \dfrac{2}{5} \cdot \dfrac{2}{7}= \boxed{\large\bf \dfrac{4}{45}}$

$\large\bf4.~c)~~ \dfrac{2}{7} \cdot \dfrac{3}{10} \cdot \dfrac{14}{10}= \dfrac{\not2}{\not7} \cdot \dfrac{3}{\not10} \cdot \dfrac{\not14}{\not10}=\dfrac{1}{1} \cdot \dfrac{3}{5} \cdot \dfrac{1}{5}= \boxed{\large\bf \dfrac{3}{25}}$

$\it ~~~~$

$\large\bf5.~a)~~ 1\dfrac{7}{8} \cdot 4\dfrac{3}{4}= \dfrac{1\cdot8+7}{8} \cdot \dfrac{4\cdot4+3}{4} =\dfrac{15}{8} \cdot \dfrac{19}{4}=\dfrac{285}{32}= \boxed{\large\bf 8\dfrac{29}{32}<10}$

$\large\bf5.~b)~~ 3\dfrac{3}{5} \cdot 3\dfrac{1}{4}= \dfrac{6\cdot5+3}{5} \cdot \dfrac{3\cdot4+1}{4} =\dfrac{33}{5} \cdot \dfrac{13}{4}=\dfrac{429}{20}= \boxed{\large\bf 21\dfrac{9}{20}>10}$

$\large\bf5.~c)~~ 2\dfrac{1}{8} \cdot 5\dfrac{1}{4}= \dfrac{2\cdot8+1}{8} \cdot \dfrac{5\cdot4+1}{4} =\dfrac{17}{8} \cdot \dfrac{21}{4}=\dfrac{357}{32}= \boxed{\large\bf 11\dfrac{5}{32}>10}$

==pav38==