Question

calculati: [1,(3)-1] totul la a doua ori 0,75=?

Answer 1

1,(3)-1=0,(3)=3/9=1/3, deci 1/3 la a doua este 1/9
0,75=75/100=3/4, deci 1/9*3/4=1/12

Answer 2

$[1,(3)-1]^{2}\cdot 0,75= (\frac{13-1}{9}-1)^{2} \cdot \frac{75}{100} = (\frac{12}{9}- \frac{9}{9})^{2} \cdot \frac{75}{100} = (\frac{3}{9})^{2}\cdot \frac{75}{100}= \\ \\ = (\frac{1}{3})^{2} \cdot \frac{75}{100} = \frac{1}{9}\cdot \frac{3}{4} = \frac{1}{12} = 0,08(3)$