Question

Resolva as seguintes frações:

A) 3/4 + 3/4
B) 7/9 - 3/9
C) 4/3 * 9/5
D) 12/2 ÷ 7/6
E) 14/7 + 3/2
F) 2 - 5/4
G) 3/10 * 24/9
H) 3/9 ÷ 3

Alguém me ajuda, por favor!

Answer 1

$a) \: \frac{3}{4} + \frac{3}{4} = \frac{6}{4}$

$b) \: \frac{7}{9} - \frac{3}{9} = \frac{4}{9}$

$c) \: \frac{4}{3} . \frac{9}{5} = \frac{36}{15} ^{ \div 3} = \frac{12}{5}$

$d) \: \frac{12}{2} \div \frac{7}{6} = \frac{72}{14} ^{ \div 2} = \frac{36}{7}$

$e) \: \frac{14}{7} + \frac{3}{2} \\ mmc = 14 \\ \frac{28}{14} + \frac{21}{14} = \frac{49}{14} ^{ \div 7} = \frac{7}{2}$

$f) \: \frac{2}{1} - \frac{5}{4} \\ mmc = 4 \\ \frac{8}{4} - \frac{5}{4} = \frac{3}{4}$

$g) \: \frac{3}{10} . \frac{24}{9} = \frac{72}{90} ^{ \div 9} = \frac{8}{10} ^{ \div 2} = \frac{4}{5}$

$h) \: \frac{3}{9} \div \frac{3}{1} = \frac{3}{27}$