Question

por favor quero respostas hoje se possivel​

Answer 1

a)

$\frac{3}{4} . \frac{7}{9} = \frac{3.7}{4.9} = \frac{21 \div 3}{36 \div 3} = \frac{7}{12}$

b)

$\frac{5}{3} . \frac{21}{8} = \frac{5}{1} . \frac{7}{8} = \frac{35}{8}$

c)

$\frac{180}{3} . \frac{24}{90} = \frac{180}{90} . \frac{24}{3} = 2.8 = 16$

d)

$\frac{5}{2} . \frac{9}{30} . \frac{2}{3} = \frac{90}{180} = \frac{1}{2}$

e)

$\frac{81}{8}. \frac{2}{9}. \frac{3}{12} \\ = \frac{81 \div 9}{9 \div 9} . \frac{2 \div 2}{8 \div 2} . \frac{3 \div 3}{12 \div 3}$

$= 9. \frac{1}{4} . \frac{1}{4} = \frac{9}{16}$

f)

$\frac{16}{12}. \frac{15}{26} = \frac{16 \div 2}{26 \div 2} . \frac{15 \div 3}{12 \div 3} = \frac{8}{13} . \frac{5}{4}$

$\frac{8}{4} . \frac{5}{13} = 2. \frac{15}{13} = \frac{30}{13}$