Question

71. Efetue os cálculos e simplifique o resultado
quando possível​

Answer 1

Vamos lá !!

• Letra A

$= \frac{69}{70} \times \frac{52}{18}$

$= \frac{3588}{1260}$

$= \frac{3588}{1260} \div 12$

$\red{ = \frac{299}{105}}$

• Letra B

$= \frac{81}{52} \times \frac{26}{117}$

$= \frac{2106}{6084}$

$= \frac{2106}{6084} \div 234$

$\red{ = \frac{9}{26}}$

• Letra C

$= \frac{9}{28} \times \frac{49}{15}$

$= \frac{441}{420}$

$= \frac{441}{420} \div 21$

$\red{ = \frac{21}{20} }$

• Letra D

$= \frac{9}{35} \times \frac{30}{9}$

$= \frac{270}{315}$

$= \frac{270}{315} \div 45$

$\red{ = \frac{6}{7}}$

• Letra E

$= \frac{84}{165} \times \frac{7}{12} \times \frac{99}{189}$

$= \frac{58.212}{374.220}$

$= \frac{58.212}{374.220} \div 8.316$

$\red{ = \frac{7}{45}}$

• Letra F

$= \frac{7}{1} \times \frac{69}{70} \times \frac{52}{18}$

$= \frac{25.116}{1.260}$

$= \frac{25.116}{1.260} \div 84$

$\red{ = \frac{299}{15} }$

Bons estudos .