Question

3/4-5/6,5/2-6/3,7/8-9/10
2/7-3/8,3/6-4/6.​

Answer 1

Explicación paso a paso:

$\frac{3}{4} - \frac{5}{6} \\ \\ = \frac{(12 \div 4 \times 3) - (12 \div 6 \times 5)}{mcm = 12} \\ \\ = \frac{9 - 10}{12} \\ \\ = - \frac{1}{12}$

$\frac{5}{2} - \frac{6}{3} \\ \\ = \frac{5}{2} - \frac{2}{1} \\ \\ = \frac{(2\div 2 \times 5) - (2\div 1 \times 2)}{mcm = 2} \\ \\ = \frac{5 - 4}{2} \\ \\ = \frac{1}{2}$

$\frac{7}{8} - \frac{9}{10} \\ \\ = \frac{(40 \div 8 \times 7) - (40 \div 10 \times 9)}{mcm = 40} \\ \\ = \frac{35 - 36}{40} \\ \\ = - \frac{1}{40}$

$\frac{2}{7} - \frac{3}{8} \\ \\ = \frac{(8 \times 2) - (7 \times 3)}{mcm = 56} \\ \\ = \frac{16 - 21}{56} \\ \\ = - \frac{5}{56}$

$\frac{3}{6} - \frac{4}{6} \\ \\ = \frac{3 - 4}{6} \\ \\ = - \frac{1}{6}$