Question

Bunica are 90 pasari.Curcile reprezinta1/6din pasari,giste le1/5,din pasari,ratele1/9 din pasari,iar restul sunt gaini.Cite gaini are bunica?

Answer 1

1/6× 90 =90:6= 15 curci
1/5×90= 90:5=18 gâște
1/9×90=90:9=10 rațe
90-(15+18+10)=
=90-(33+10)
=90-43= 47 găini

baftă!

Answer 2

$\it \frac{1}{6} \cdot 90 = 15~(curci) \\ \\ \it \frac{1}{5} \cdot 90 = 18~(gaste) \\ \\ \it \frac{1}{9} \cdot 90 = 10~(rate) \\ \\ 15 + 18 + 10 = 33 + 10 = 43~(curci + gaste + rate) \\ \\ \it 90 - 43 = 47~(gaini)$