Question

-7/20-11/15+3
Como se resolve essa questão??

Answer 1

Resposta:

e) $\frac{5}{7} + \frac{11}{15} - \frac{6}{5}$= $\frac{21}{25}$

Explicação passo-a-passo:

$\frac{5}{7} + \frac{11}{15} - \frac{6}{5}$

mmc:

7 / 15 | 7

1 / 15 | 5

1 / 3 | 3

1 / 1 |

7 × 5 × 3 = 105

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• 105 ÷ 7 = 15 × 5 = 75

• 105 ÷ 5 = 21 × 11 = 231

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$\frac{75 + 231}{150} - \frac{6}{5}$

$\frac{306}{150} - \frac{6}{5}$

$\frac{ {306}^{\div 6} }{ {150}^{ \div 6} } - \frac{6}{5}$

$\frac{51}{25} - \frac{6}{5}$

mmc:

25 / 5 | 5

5 / 1 | 5

1 / 1 |

5 × 5 = 25

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• 25 ÷ 25 = 1 × 51 = 51

• 25 ÷ 5 = 5 × 6 = 30

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$\frac{51 - 30}{25}$

$\frac{21}{25}$