Question

510 выполни страница 174

Answer 1

$( frac{7}{15} - frac{1}{6} )+ frac{2}{5} =( frac{14}{30} - frac{5}{30} )+ frac{2}{5} = frac{9}{30} + frac{2}{5} = frac{3}{10} + frac{4}{10} = frac{7}{10} =0,7$

$( frac{3}{8} - frac{1}{9} )+ frac{25}{36} =( frac{27}{72} - frac{8}{72} )+ frac{25}{36} = frac{19}{72} + frac{50}{72} =frac{69}{72} =frac{23}{24}$

$( frac{8}{9} - frac{5}{6} )+ frac{2}{3} =( frac{16}{18} - frac{15}{18} )+ frac{2}{3} = frac{1}{18} + frac{12}{18} =frac{13}{18}$

$( frac{7}{8} - frac{13}{20} )+ frac{9}{10} =( frac{35}{40} - frac{26}{40} )+ frac{9}{10} =frac{9}{40} + frac{36}{40} =frac{45}{40} =frac{9}{8} =1 frac{1}{8} =1,125$

$( frac{7}{18} - frac{1}{12} )+ frac{5}{6} =( frac{14}{36} - frac{3}{36} )+ frac{5}{6} = frac{11}{36} + frac{30}{36} = frac{41}{36} =1 frac{5}{36}$

$( frac{3}{4} - frac{8}{15} )+ frac{17}{20} =( frac{45}{60} - frac{32}{60} )+ frac{17}{20} = frac{13}{60} + frac{51}{60} = frac{64}{60} = frac{16}{15} = 1frac{1}{15}$

Answer 2

спасибо