Question

Помогите решит
!
а)7/5/12+4/3/8
б)3/11/20+2/19/30
в)9/5/6-2/3/4
г)3/3/10-1/7/15

Answer 1

а) 7/5/12=$frac{7*12}{5}$
    4/3/8=$frac{4*8}{3}$
⇒$frac{7*12}{5}$+$frac{4*8}{3}$=$frac{3*84+5*32}{15} = frac{412}{15}$

б)$frac{20*3}{11}+ frac{30*2}{19} = frac{19*20*3+30*2*11}{11*19} = frac{1800}{209}$

в)$frac{9*6}{5}- frac{2*4}{3}= frac{9*6*3-2*4*5}{15}= frac{122}{15}$

г)$frac{3*10}{3}- frac{1*15}{7} = frac{210-45}{21}= frac{165}{21}$