Question

a) \frac{4}{7} + \frac{2}{7}74​+72​ b \frac{9}{11} - \frac{2}{11}119​−112​ c) \frac{5}{8} + \frac{3}{12}85​+123​ d) \frac{5}{8} + \frac{1}{15}85​+151​ e) \frac{2}{3} + \frac{1}{2}32​+21​ f) 5 + \frac{2}{3}5+32​ g) 8 + 3. \frac{1}{5}8+3.51​ ultima h) 7 - 3( \frac{5}{6} \frac{2}{3})7−3(65​32​) jente me ajuda pfv preciso muito conto com vcs​

Answer 1

Resposta:

a)

$\frac{4}{7}+\frac{2}{7}$

$=\frac{4+2}{7}=\frac{6}{7}$

b)

$\frac{9}{11}-\frac{2}{11}$

$=\frac{9-2}{11}=\frac{7}{11}$

c)

$\frac{5}{8}+\frac{3}{12}$

 $=\frac{5}{8}+\frac{1}{4}=\frac{5}{8}+\frac{2}{8}=\frac{5+2}{8}=\frac{7}{8}$

d)

$\frac{5}{8}+\frac{1}{15}$

$=\frac{75}{120}+\frac{8}{120}=\frac{75+8}{120}=\frac{83}{120}$

e)

$\frac{2}{3}+\frac{1}{2}$

$=\frac{4}{6}+\frac{3}{6}=\frac{4+3}{6}=\frac{7}{6}$

f)

$5+\frac{2}{3}$

$5+\frac{2}{3}=\frac{15+2}{3}=\frac{17}{3}$

g)

$8+3\cdot \frac{1}{5}$

$=8+\frac{3}{5}=\frac{43}{5}=8,6$

h)

$7-3\left(\frac{5}{6}\cdot \frac{2}{3}\right)$

$=7-3\cdot \frac{5}{9}=7-\frac{5}{3}=\frac{16}{3}=5,333$