Question

. Выполните действие: a) 4 4/15+1 5/6= б) 6 7/15-3 9/10= в) 2 9/35+1 9/14= г) 4 1/26-3 8/39=

Answer 1

$4 \frac{4}{15} +1 \frac{5}{6} = 4 \frac{4*2}{15*2} +1 \frac{5*5}{6*5} =5 \frac{8}{30} +1 \frac{25}{30} =5 \frac{33}{30}= 6 \frac{1}{10} \\ 6 \frac{7}{15} -3 \frac{9}{10}=6 \frac{7*2}{15*2} -3 \frac{9*3}{10*3} =6 \frac{14}{30} -3 \frac{27}{30} =5 \frac{44}{30} - 3 \frac{27}{30} =2 \frac{17}{30} \\ 2 \frac{9}{35} +1 \frac{9}{14} =2 \frac{9*2}{35*2}+1 \frac{9*5}{14*5} =2 \frac{18}{70} +1 \frac{45}{70} =3 \frac{63}{70} =3 \frac{9}{10}$
$4 \frac{1}{26} - 3 \frac{8}{39} = 4 \frac{1*3}{26*3}-3 \frac{8*2}{39*2} =4 \frac{3}{78} -3 \frac{16}{78}=3 \frac{81}{78} -3 \frac{16}{78} = \frac{65}{78} = \frac{5}{6}$