Question

efetue as adições
a) (+3/5) + (+1/2)
b) (-2/3) + (+5/4)
c) (-4/9) + (+2/3)​

Answer 1

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

$\frac{6 + 5}{10} = \frac{11}{10}$

$b)( - \frac{2}{3} ) + ( + \frac{5}{4} ) = \\ \\ - \frac{2}{3} + \frac{5}{4} = \\ \\ \frac{ - 8 + 15}{12} = \frac{7}{12}$

$c)( - \frac{4}{9} ) + ( + \frac{2}{3} ) = \\ \\ - \frac{4}{9} + \frac{2}{3} = \\ \\ \frac{ - 4 + 6}{9} = \frac{2}{9}$