Question

Encontre as frações equivalentes à :
A) 2/3 com denominador 18
B) 10/8 com denominador 80
C) 9/7 com numerador 81
D) 6/12 com numerador36

Answer 1

Resposta:

A) 12/18

B) 100/80

C) 81/63

D) 36/72

Explicação:

A) 2/3 = 2×6/3×6 = 12/18

B) 10/8 = 10×10/8×10 = 100/80

C) 9/7 = 9×9/7×9 = 81/63

D) 6/12 = 6×6/12×6 = 36/72

Answer 2

Explicação passo-a-passo:

A) 2/3 com denominador 18

$\dfrac{2}{3} = \dfrac{x}{18}$

$3x = 2 \times 18$

$3x = 36$

$x = \dfrac{36}{3}$

$x = 12$

____________

2/3=12/18

B) 10/8 com denominador 80

$\dfrac{10}{8} = \dfrac{x}{80}$

$8x = 10 \times 80$

$8x = 800$

$x = \dfrac{800}{8}$

$x = 100$

____________

10/8=100/800

C) 9/7 com numerador 81

$\dfrac{9}{7} = \dfrac{81}{x}$

$9x = 7 \times 81$

$9x = 567$

$x = \dfrac{567}{9}$

$x = 63$

____________

9/7=81/63

D) 6/12 com numerador36

$\dfrac{6}{12} = \dfrac{36}{x}$

$6x = 12 \times 36$

$6x = 432$

$x = \dfrac{432}{6}$

$x = 72$

____________

6/12=36/72