Răspuns:
Explicație pas cu pas:
Voi simplifica numitorul cu numaratorul prin divizorii comuni
a)
[tex]\displaystyle\frac{5}{\not8} \times \frac{\not3}{7} \times \frac{\not4}{\not9} =\frac{5}{2} \times \frac{1}{7} \times \frac{1}{3} =\frac{5}{42}[/tex]
b)
[tex]\displaystyle\frac{1}{\not9} \times \frac{2}{5} \times \frac{\not18}{7} =\frac{2}{5}\times\frac{2}{7} =\frac{4}{35}[/tex]
c)
[tex]\displaystyle\frac{\not2}{\not7} \times \frac{3}{\not10} \times \frac{\not14}{10} =\frac{3}{5} \times \frac{7}{10} =\frac{21}{50}[/tex]
d)
[tex]\displaystyle2 \frac{1}{2} \times \frac{3}5} \times \frac{1}{2} =\frac{2\times2+1}{2} \times\frac{3}{5}\times\frac{1}{2} =\frac{\not5}{2} \times\frac{3}{\not5} \times\frac{1}{2} = \frac{3}{4}[/tex]
e)
[tex]\displaystyle4\times\frac{3}{7} \times 2\frac{1}{3} =4\times\frac{3}{7} \times\frac{2\times3+1}{3} =4\times\frac{\not3}{\not7} \times\frac{\not7}{\not3} =4[/tex]
f)
[tex]\displaystyle5 \times3 \frac{1}{4} \times \frac{5}{8} =5 \times \frac{3\times4+1}{4} \times \frac{5}{8} =5 \times \frac{13}{4} \times \frac{5}{8} =\frac{325}{32}[/tex]
g)
[tex]\displaystyle\not2 \times\frac{1}{3} \times \frac{31}{\not2} \times4=\frac{124}{3}[/tex]
h)
[tex]\displaystyle \frac{1}{5} \times\not2\times\frac{1}{\not2} \times 3 =\frac{3}{5}[/tex]
