Придумайте и решите 8 примеров с обыкновенными дробями.

$1) frac{1}{2}+ frac{1}{2}= frac{2}{2} = 1$
$2) frac{1}{3} + frac{2}{6} = frac{2}{6} + frac{2}{6} = frac{4}{6} = frac{2}{3}$
$3) frac{9}{5} - frac{2}{3} = frac{27}{15} - frac{10}{15} = frac{17}{15}=2 frac{2}{5}=2,4$
$4) frac{6}{7}* frac{4}{6}= frac{6*4}{7*6} = frac{24}{42} = frac{4}{7}$
$5) frac{1}{2} * frac{2}{1} = frac{1*2}{2*1} = frac{2}{2}=1$
$6) frac{12}{16}: frac{2}{4}= frac{12}{16}* frac{4}{2} = frac{12*4}{16*2} = frac{24}{32} = frac{3}{4}$
$7) frac{3}{4} : frac{3}{4}= frac{3}{4} * frac{4}{3}= frac{3*4}{4*3} = frac{12}{12} =1$
$8) frac{2}{3} *( frac{1}{2}- frac{5}{6} + frac{3}{4}):2= frac{2}{3}*( frac{6}{12} - frac{10}{12} + frac{9}{12}):2= frac{2}{3} * frac{5}{12}:2 = frac{2*5}{3*12}:2$ $= frac{10}{36}:2= frac{5}{18}: frac{2}{1} = frac{5}{18} * frac{1}{2}= frac{5}{36}$