Question

Me ajudem aí por favor​

Answer 1

b)

$\frac{3}{5} = \frac{9}{15} \\ \\ \frac{2}{3} = \frac{10}{15} \\ \\ \\ \frac{9}{15} + \frac{10}{15} = \frac{19}{15}$

c)

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

d)

$\frac{6}{5} - \frac{3}{5} = \frac{3}{5}$

e)

$\frac{1}{2} = \frac{2}{4} \\ \\ \frac{2}{4} - \frac{1}{4} = \frac{1}{4}$

f)

$\frac{7}{2} = \frac{35}{10} \\ \\ \frac{3}{2} = \frac{15}{10} \\ \\ \frac{1}{5} = \frac{2}{10} \\ \\ \\ \frac{35}{10} - \frac{15}{10} - \frac{2}{10} = \frac{18}{10} = 1.8$

g)

$2.5 + 3.8 = 6.3$

h)

$1.75 + 5.7 = 7.45$