Question

calcule os exercícios sobre soma de frações a seguir: a 1/2+ 4/5 = b 2/3+7/3= c 5/6+1/2 = d 9/5+3/4 =​

Answer 1

Resposta:

a) 13/10

b) 3

c) 4/3

d) 51/20

Explicação passo a passo:

$a)\ \frac{1}{2} +\frac{4}{5} \\\\\frac{1}{2} \times \frac{5}{5} +\frac{4}{5} \times \frac{2}{2} \\\\\frac{1\times5}{2\times5} +\frac{4\times2}{5\times2} \\\\\frac{5}{10} +\frac{8}{10} \\\\\frac{5+8}{10} \\\\\frac{13}{10}$

$b)\ \frac{2}{3} +\frac{7}{3} \\\\\frac{2+7}{3} \\\\\frac{9}{3} \\\\3$

$c)\ \frac{5}{6} +\frac{1}{2} \\\\\frac{5}{6} +\frac{1}{2}\times\frac{3}{3} \\\\\frac{5}{6} +\frac{1\times3}{2\times3} \\\\\frac{5}{6} +\frac{3}{6} \\\\\frac{5+3}{6} \\\\\frac{8}{6} \\\\\frac{8:2}{6:2} \\\\\frac{4}{3}$

$d)\ \frac{9}{5} +\frac{3}{4} \\\\\frac{9}{5} \times\frac{4}{4} +\frac{3}{4} \times\frac{5}{5} \\\\\frac{9\times4}{5\times4} +\frac{3\times5}{4\times5} \\\\\frac{36}{20} +\frac{15}{20} \\\\\frac{36+15}{20} \\\\\frac{51}{20}$