Question

me ajudem por favor!
13-calcule o valor das expressões ​

Answer 1

a)

$\frac{3}{4} + \frac{1}{3} - \frac{1}{6} = \frac{9 + 4 -2}{12} = \frac{11}{12}$

b)

$3 - 2 \frac{1}{2} + \frac{1}{4} = 3 - \frac{5}{2} + \frac{1}{4} = \\ \\ \frac{12 - 10 + 1}{4} = \frac{3}{4} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

c)

$\frac{1}{2} + 1 \frac{1}{3} - 1 \frac{1}{4} = \frac{1}{2} + \frac{4}{3} - \frac{5}{4} = \\ \\ \frac{6 + 16 - 15}{12} = \frac{7}{12} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

d)

$\frac{11}{12} - \frac{5}{6} + \frac{2}{9} = \frac{33 - 30 + 8}{36} = \frac{11}{36}$

Espero ter ajudado você!