срочно решите 4/27+4/9=

1/2+86/100=

8/9+3/4+2/12=

24/10+7/5

7/9+6+2/7

Ответы:

$frac{4}{27} + frac{4}{9} = frac{4}{27}+ frac{4*3}{9*3} = frac{4+4*3}{27} = frac{16}{27}$

$frac{1}{2} + frac{86}{100} = frac{50}{100}+ frac{86}{100}= frac{136}{100}$

$frac{8}{9} + frac{3}{4} + frac{2}{12}= frac{8*2*2}{3*3*2*2}+ frac{3*3*3}{3*3*2*2}+ frac{2*3}{3*3*2*2}= frac{32+27+6}{36} = frac{65}{36}$

$frac{24}{10} + frac{7}{5} = frac{24+7*2}{10}= frac{38}{10}$

$frac{7}{9}+6+ frac{2}{7} = frac{7*7+6*63+2*9}{63} = frac{445}{63}$