Question

ionel a chieltuit pe o minge 3 cincimi din suma de 400 lei.câti lei mai are ionel?rezolvati în doua moduri.​

Answer 1

I)

$\it \dfrac{3}{5}\ din\ 400=\dfrac{3}{5}\cdot400=\dfrac{1200}{5}=240\ \ell ei\ \ (cost\breve a\ \ mingea)\\ \\ \\ 400-240=160\ \ell ei\ \ (mai\ \ are\ \ Ionel)$

II)

$\it 1-\dfrac{3}{5}=\dfrac{2}{5}\ din\ 400\ \ell ei\ mai\ are\ Ionel\\ \\ \\ \dfrac{2}{5}\ din\ 400=\dfrac{2}{5}\cdot400=\dfrac{800}{5}=160\ \ell ei\ \ (mai\ \ are\ \ Ionel)$