Question

1) Calcule e simplifique os resultados quando possivel:

a) 8/5 + 5/6 b) 2/3 + 7/8 c) 7/2 + 2/9

2) Encontre a fração dos números:

a) 1/8 de 100 b) 2/8 de 100 c) 1/5 de 150 d) 2/5 150 e) 1/3 de 210 f) 2/3 de 210

Answer 1

1)

$\frac{8}{5}+\frac{5}{6}=\frac{48+25}{30} =\frac{73}{30} \\\\\frac{2}{3}+ \frac{7}{8} =\frac{16+21}{24} =\frac{37}{24} \\\\\frac{7}{2}+ \frac{2}{9} =\frac{63+4}{18}=\frac{67}{18}$

2)

$\frac{1}{8}.100=\frac{100}{8}=\frac{50}{4}=\frac{25}{2}=12,5\\\\\frac{2}{8}.100= \frac{200}{8}= \frac{100}{4} =\frac{50}{2}= \frac{25}{1} \\\\\frac{1}{5}.150= \frac{150}{5}= \frac{30}{1} \\\\\frac{2}{5}.150= \frac{300}{5}= \frac{60}{1}\\ \\\frac{1}{3}.210 =\frac{210}{3} =\frac{70}{1} \\\\\frac{2}{3}.210= \frac{420}{3}=\frac{120}{1}$

Espero ter ajudado, bons estudos.