Question

27supra 70 înmulțit 5,8(3)-0,75

Answer 1

27/70 x 5,8(3) - 0.75 

5,8(3)=583-58/90=525/90
0.75=75/100=3/5(simplificare)

27/70x525/90-3/5
14175/6300-3/5 =
= ADUCI LA ACELAS NUMITOR SI CALCULEZI .

Answer 2

$\displaystyle \frac{27}{70} \cdot 5,8(3)-0,75= \frac{27}{70} \cdot \frac{583-58}{90} - \frac{75}{100} = \frac{27}{70} \cdot \frac{525}{90} - \frac{75}{100}= \\ \\ = \frac{14175}{6300} - \frac{75}{100}= \frac{14175}{6300} - \frac{4725}{6300} = \frac{9450}{6300} = \frac{3}{2}$