Решити паже ........ Только правильно

2) $3 \frac{5}{12} +9 \frac{1}{6} -5 \frac{1}{18} =7 \frac{19}{36} \\ \\ (1) = 3 \frac{5}{12} +9 \frac{1}{6} =12 \frac{7}{12} \\ \\ 3 \frac{5*1}{12} +9 \frac{1*2}{12} =3+9 \frac{5+2}{12} =12 \frac{7}{12} \\ \\ (2) = 12 \frac{7}{12} -5 \frac{1}{18} =7 \frac{19}{36} \\ 12=2*2*3 \\ 18=2*3*3 \\ \\ HOK=12*3=36 \\ \\ 12 \frac{7*3}{36} -5 \frac{1*2}{36} =12-5+ \frac{21-2}{36} =7 \frac{19}{36}$

4) $5 \frac{2}{3} +11 \frac{7}{12} -4 \frac{3}{4} =12 \frac{1}{2} \\ \\ (1)=5 \frac{2}{3} +11 \frac{7}{12} =17 \frac{1}{4} \\ \\ 5 \frac{2*4}{12} +11 \frac{7*1}{12} =5+11 \frac{8+7}{12} =16 \frac{15}{12} =17 \frac{1}{4} \\ \\ 16 \frac{15}{12} =17 \frac{3}{12} =17 \frac{3}{2*2*3} =17 \frac{1}{4} \\ (2)=17 \frac{1}{4} -4 \frac{3}{4} =12 \frac{1}{2} \\ \\ 17\frac{1*1}{4} -4 \frac{3*1}{4} =16-4+ \frac{5-3}{4} =12 \frac{2}{4}=12 \frac{1}{2}$ $12\frac{2}{4} =12 \frac{2}{2*2} =12 \frac{1}{2}$