Помогите пожалуйста номер 475,476

№457 $1) \frac{1}{4} + \frac{1}{3} = \frac{4+3}{12} = \frac{7}{12}$
$2) \frac{1}{6} + \frac{1}{3} = \frac{6+3}{18} = \frac{9}{18} = \frac{1}{2}$
$3)\frac{1}{3} + \frac{1}{10} = \frac{10+3}{30} = \frac{13}{30}$
$4) \frac{1}{4} + \frac{1}{8} = \frac{4+8}{32} = \frac{12}{32} = \frac{3}{8}$
№458 $1) \frac{1}{9} + \frac{1}{5} = \frac{9+5}{45} = \frac{14}{45}$
$2) \frac{1}{4}+ \frac{1}{10} = \frac{4+10}{40} = \frac{14}{40} = \frac{7}{20}$ $3) \frac{1}{6} + \frac{1}{4} = \frac{6+4}{24} = \frac{10}{24}$ $4) \frac{1}{9} + \frac{1}{4} = \frac{9+4}{36} = \frac{13}{36}$