Question

Efetue as adições e subtrações com denominadores diferentes:
A) 1/2+1/3
B) 1/2+1/13+5/6
C) 5/6-1/2

Answer 1

Resposta:

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

$b)\frac{1}{2} +\frac{1}{13} +\frac{5}{6} = \frac{39+6+65}{78} =\frac{110}{78} : 2=\frac{55}{39}$

$c)\frac{5}{6} -\frac{1}{2} =\frac{5-3}{6} =\frac{2}{6} :2=\frac{1}{3}$