Question

me ajudem nessa por favor ​

Answer 1

desculpa à demora

espero ter ajudado você

$a) \: \frac{3}{8} + \frac{1}{6} = \frac{3(3) + 4}{24} = \frac{9 + 4}{24} = \frac{9 + 4}{24} = \frac{13}{24}$

$b) \: \frac{9}{10} - \frac{1}{4} = \frac{9(2) - 5}{20} = \frac{18 - 5}{20} = \frac{13}{20}$

$c) \: \frac{5}{9} + \frac{2}{6} = \\ \frac{5}{9} + \frac{1}{3} = \frac{ 5 + 3}{9} = \frac{8}{9}$

$d) \: \frac{11}{15} - \frac{1}{2} = \frac{11(2) - 15}{30} = \frac{22 - 15}{30} = \frac{7}{30}$

Answer 2

$a)83+61=243(3)+4=249+4=249+4=2413 \\ </p><p></p><p>b) \: \frac{9}{10} - \frac{1}{4} = \\ \frac{9(2) - 5}{20} = \frac{18 - 5}{20} = \frac{13}{20}b)109−41 \\ =209(2)−5=2018−5=2013</p><p></p><p>\begin{gathered}c) \: \frac{5}{9} + \\ \frac{2}{6} = \\ \frac{5}{9} + \\ \frac{1}{3} = \frac{ 5 + 3}{9} = \frac{8}{9} \end{gathered}c)95+62=95+31=95+3=98 \\ </p><p></p><p>d) \: \frac{11}{15} - \frac{1}{2} = \\ \frac{11(2) - 15}{30} = \frac{22 - 15}{30} = \frac{7}{30}d)1511−21=3011(2)−15=3022−15=307 \\ </p><p></p><p>$