Question

Rut gon cac phan so sau

a)\(\frac{4.7}{9.32}\)

b)\(\frac{990}{2610}\)

c)\(\frac{374}{-506}\)

Answer 1

\(a.\frac{4.7}{9.32}=\frac{4.7}{4.8.9}=\frac{7}{8.9}=\frac{7}{72}\)

\(b.\frac{990}{2610}=\frac{990\div90}{2610\div90}=\frac{11}{29}\)

\(c.\frac{374}{-506}=\frac{374\div\left(-22\right)}{-506\div\left(-22\right)}=\frac{-17}{23}\)

Answer 2

\(\frac{4\cdot7}{9\cdot32}=\frac{4\cdot7}{9\cdot4\cdot8}=\frac{7}{9\cdot8}=\frac{7}{72}\)

\(\frac{990}{2610}=\frac{2\cdot3^2\cdot5\cdot11}{2\cdot3^2\cdot5\cdot29}=\frac{11}{29}\)

\(\frac{374}{-506}=-\frac{374}{506}=\frac{2\cdot11\cdot17}{2\cdot11\cdot23}=-\frac{17}{23}\)

Answer 3

a, \(\frac{4.7}{9.32}=\frac{2.2.7}{9.2.2.8}=\frac{7}{72}\)

b, \(\frac{990}{2610}=\frac{990:90}{2610:90}=\frac{11}{29}\)

c, \(\frac{374}{-506}=\frac{374:22}{-506:22}=\frac{17}{-23}=-\frac{17}{23}\)