Question

a)3/4+4/7=
b)5/2-1/6=
c)7/3-5/12=
d)3/8+7/12=
2) resolva as operações
a)4/12×6/16=
b)1/10×10/15=
c)3/5÷9/15=
d)3/20÷21/18=​

Answer 1

$a) \frac{3}{4} + \frac{4}{7} \\ \frac{21 + 16}{28} \\ \frac{37}{28}$

$b) \frac{5}{4} - \frac{1}{6} \\ \frac{15 - 1}{6} \\ \frac{14}{6} \\ \frac{7}{3}$

$c) \frac{7}{3} - \frac{5}{12} \\ \frac{28 - 5}{12} \\ \frac{23}{12}$

$d) \frac{3}{8} + \frac{7}{12} \\ \frac{9 + 14}{24} \\ \frac{23}{24}$

$2. \: a) \frac{4}{12} \times \frac{6}{16} \\ \frac{1}{3} \times \frac{3}{8} \\ \frac{1}{8}$

$b) \frac{1}{10} \times \frac{10}{15} \\ \frac{1}{5}$

$c) \frac{3}{5} \div \frac{9}{15} \\ \frac{3}{5} \times \frac{15}{9} \\ \frac{3}{3} \\ 1$

$d) \frac{3}{20} \div \frac{21}{18} \\ \frac{3}{20} \times \frac{18}{21} \\ \frac{1}{10} \times \frac{9}{7} \\ \frac{9}{70}$

espero ter ajudado.