Question

5 - resolva as adiçoes e subtraçoes em fração
a) 1\2 + 3\2 =
b) 4\3 + 5\3 =
c) 5\6 + 2\6 =
d) 1\2 + 1\3 =
e) 1\2 + 1\4 =
f ) 1\3 + 1\4 =
g) 3\4 - 2\3 =
h) 2\5 - 1\3 =
​

Answer 1

Resposta:

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

$\frac{4}{3} + \frac{5}{3} = \frac{4 + 5}{3} = \frac{9}{3} = \frac{3}{1}$

$\frac{5}{6} + \frac{2}{6} = \frac{5 + 2}{6} = \frac{7}{6}$

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

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

$\frac{1}{3} + \frac{1}{4} = \frac{4 + 3}{12} = \frac{7}{12}$

$\frac{3}{4} - \frac{2}{3} = \frac{9 + 8}{12} = \frac{17}{12}$

$\frac{2}{5} - \frac{1}{3} = \frac{6 - 5}{15} = \frac{1}{15}$