Question

Помогите решить номер 617

Answer 1

$1) frac{7}{16} + frac{1}{4} = frac{7}{16} + frac{4}{16} = frac{11}{16} \ \ 2) frac{25}{36} - frac{2}{9} = frac{25}{36} - frac{8}{36} = frac{17}{36} \ \ 3) frac{7}{12} - frac{5}{24} = frac{14-5}{24} = frac{9}{24} = frac{3}{8} \ \ 4) frac{5}{7} - frac{11}{21} = frac{15-11}{21} = frac{4}{21} \ \ 5) frac{1}{6} + frac{5}{18} = frac{3}{18} + frac{5}{18} = frac{8}{18} = frac{4}{9} \ \ 6) frac{19}{45} + frac{4}{15} = frac{19+12}{45} = frac{31}{45}$

$7) frac{15}{16} - frac{3}{32} = frac{30-3}{32} = frac{27}{32} \ \ 8) frac{7}{15} + frac{1}{3} = frac{7+5}{15} = frac{12}{15} = frac{4}{5} \ \ 9) frac{11}{13} - frac{20}{39} = frac{33-20}{39} = frac{13}{39} = frac{1}{2} \ \ 10) frac{3}{50} + frac{18}{25} = frac{3+36}{50} = frac{39}{50} \ \ 11) frac{43}{62} - frac{10}{31} = frac{43-20}{62} = frac{23}{62} \ \ 12) frac{29}{64} + frac{3}{8} = frac{29+24}{64} = frac{56}{64}$