Question

Cual es el doble,triple ,cuadruple, y mitad de 4/5,6/9,5/1,3/3,6/7,1/2,7/9,5/7,3/9,2/10

Answer 1

$\frac{4}{5} \times 2 = \frac{8}{5} \: \: \: \frac{4}{5} \times 3 = \frac{12}{5} \\ \frac{4}{5} \times 4 = \frac{16}{5} \: \: \: \frac{4}{5} \div 2 = \frac{4}{10}$

$\frac{6}{9} \times 2 = \frac{12}{9} \: \: \: \frac{6}{9} \times 3 = \frac{18}{9} = 2 \\ \frac{6}{9} \times 4 = \frac{24}{9} \: \: \: \frac{6}{9} \div 2 = \frac{6}{18}$

$\frac{5}{1} \times 2 = \frac{10}{1} = 10 \: \: \: \frac{5}{1} \times 3 = \frac{15}{1} = 15 \\ \frac{5}{1} \times 4 = \frac{20}{1} = 20 \: \: \: \frac{5}{1} \div 2 = \frac{5}{2}$

$\frac{3}{3} \times 2 = \frac{6}{3} = 2 \: \: \: \frac{3}{3} \times 3 = \frac{9}{3} = 3 \\ \frac{3}{3} \times 4 = \frac{12}{3} = 4 \: \: \: \frac{3}{} \div 2 = \frac{3}{6}$

$\frac{6}{7} \times 2 = \frac{12}{7} \: \: \: \frac{6}{7} \times 3 = \frac{18}{7} \\ \frac{6}{7} \times 4 = \frac{24}{7} \: \: \: \frac{6}{7} \div 2 = \frac{6}{14}$

$\frac{1}{2} \times 2 = \frac{2}{2} = 1 \: \: \: \frac{1}{2} \times 3 = \frac{3}{2} \\ \frac{1}{2} \times 4 = \frac{4}{2} = 2 \: \: \: \frac{1}{2} \div 2 = \frac{1}{4}$

El resto ya debes saber como hecerlo. ;)