Помогите a) 7 [latex] frac{5}{12} [/latex] + 4 [latex] frac{3}{8} [/latex] б) 3 [latex] frac{11}{20} [/latex] + 2 [latex] frac{19}{20} [/latex] в) 9 [latex] frac{5}{6} [/latex] - 2 [latex] frac{3}{4} [/latex] г) 3 [latex] frac{3}{10} [/latex] - 1 [latex] frac{7}{15} [/latex]

1)7 5/12+4 3/8=7 10/24+4 9/24=11 19/242)3 11/20+2 19/20=5 30/20=6 10/20=6 1/23)9 5/6-2 3/4=9 10/12-2 9/12=7 1/124)3 3/10-1 7/15=3 9/30-1 14/30=2 39/30-1 14/30=1 25/30=1 5/6

[latex]7 frac{5}{12} +4 frac{3}{8} =7 frac{10}{24} +4 frac{9}{24} =11 frac{19}{24} [/latex][latex]3 frac{11}{20} +2 frac{19}{20} =5 frac{30}{20} =6 frac{1}{2} [/latex][latex]9 frac{5}{6} -2 frac{3}{4} =9 frac{10}{12} -2 frac{9}{12} =7 frac{1}{12} [/latex][latex]3 frac{3}{10} -1 frac{7}{15} =3 frac{9}{30} -1 frac{14}{30} =1 frac{25}{30} =1 frac{5}{6} [/latex]