Question

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Answer 1

Resposta:

a.

$\frac{1}{3} + \frac{1}{5} = \frac{5 + 3}{15} = \frac{8}{15}$

b.

$\frac{3}{4} + \frac{1}{2} = \frac{3 + 2}{4} = \frac{5}{4}$

c.

$\frac{2}{4} + \frac{2}{3} = \frac{1}{2} + \frac{2}{3 } = \frac{3 + 5}{6} = \frac{8}{6}$

d.

$\frac{1}{4} + \frac{2}{3} + \frac{1}{2} = \frac{3 + 8 + 6}{12} = \frac{17}{12}$

e.

$\frac{5}{4} - \frac{1}{2} = \frac{5 - 2}{4} = \frac{3}{4}$

f.

$\frac{3}{5} - \frac{2}{7} = \frac{21 - 10}{35} = \frac{11}{35}$