Question

Calcule:
2 3
_- _=
3 7

2,84-3,7=

1 2
_+ _ =
2 5

5 3
_- _ =
6 4
São Frações. ..

Answer 1

$\frac{2}{3} - \frac{3}{7} = \frac{14-9}{21} = \frac{5}{21} \\\\ 2,84 - 3,7 = \frac{284}{100} - \frac{37}{10} = \frac{284-370}{100} = \frac{-86}{100} = -0,86\\\\ \frac{1}{2} + \frac{2}{5} = \frac{5+4}{10} = \frac{10}{10} = 1\\\\ \frac{5}{6} - \frac{3}{4} = \frac{10-9}{12} = \frac{1}{12}$

Espero ter ajudado!