Question

Verificați dacă urm,rapoarte formeaza proporții
B.7 supra 3,5=14supra 7
D. 4 supra18=2 supra 5
E. 6 supra 0,1=0,6suprA 1
F. 3 supra 2=2 supra 6
G. 5 supra 10=2 supra 12,5

Answer 1

Răspuns: Ai rezolvarea mai jos pentru fiecare subpunct

Explicație pas cu pas:

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(B)

$\bf \dfrac{7}{3,5} = \dfrac{7}{\dfrac{35}{10}} =\dfrac{7}{1}:\dfrac{35}{10}=\dfrac{7}{1}\cdot\dfrac{10}{35}=\dfrac{70}{35} =\dfrac{\not70}{\not35} =\dfrac{2}{1}=\boxed{\bf 2}$

$\bf \dfrac{14}{7 } =\dfrac{\not14}{\not7} =\dfrac{2}{1}=\boxed{\bf 2}$   2 = 2 ⇒ formeaza proportie

(D)

$\bf \dfrac{4}{18} =\dfrac{\not4}{\not18} =\boxed{\bf \dfrac{2}{9}}$

$\bf \dfrac{2}{5}$                  ⇒ NU formeaza proportie

(E)

$\bf \dfrac{6}{0,1} = \dfrac{6}{\dfrac{1}{10}} =\dfrac{6}{1}:\dfrac{1}{10}=\dfrac{6}{1}\cdot\dfrac{1}{10}=\dfrac{6}{10} =\dfrac{\not6}{\not10} =\boxed{\bf\dfrac{3}{5}}$

$\bf \dfrac{0,6}{1} = \dfrac{\dfrac{6}{10}}{1}} =\dfrac{6}{10}:\dfrac{1}{1}=\dfrac{6}{10} =\dfrac{\not6}{\not10} =\boxed{\bf\dfrac{3}{5}}$    ⇒ formeaza proportie

(F)

$\bf \dfrac{3}{2}$

$\bf \dfrac{2}{6} =\dfrac{\not2}{\not6} =\boxed{\bf\dfrac{1}{3}}$    ⇒ NU formeaza proportie

(G)

$\bf \dfrac{5}{10} =\dfrac{\not5}{\not10} =\boxed{\bf\dfrac{1}{2}}$

$\bf \dfrac{2}{12,5} = \dfrac{2}{\dfrac{125}{10}} =\dfrac{2}{1}:\dfrac{125}{10}=\dfrac{2}{1}\cdot\dfrac{10}{125}=\dfrac{20}{125} =\dfrac{\not20}{\not125} =\boxed{\bf\dfrac{4}{25}}$  

⇒ NU formeaza proportie

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