Question

Calcule as operações com as frações:

13-5
-- -- =
14 7

1-2
-- -- =
2 9

2+10
-- -- =
3 15​

Answer 1

a)

$\frac{13}{14} - \frac{5}{7} = \frac{13.7 - 14.5}{14.7} = \frac{91 - 70}{98} = \frac{21}{98} = \frac{3}{14}$

b)

$\frac{1}{2} - \frac{2}{9} = \frac{1.9 - 2.2}{2.9} = \frac{9 - 4}{18} = \frac{5}{18}$

c)

$\frac{2}{3} + \frac{10}{15} = \frac{2.15 + 10.3}{15.3} = \frac{30 + 30}{45} = \frac{60}{45} = \frac{12}{9} = \frac{4}{3}$