Очень нужно помогите пожалуйста))))

#3
$3-\frac{1}{4}=2\frac{4}{4}-\frac{1}{4}=2\frac{3}{4}$
$2-\frac{1}{3}=1\frac{3}{3}-\frac{1}{3}=1\frac{2}{3}$
$5-\frac{3}{4}=4\frac{4}{4}-\frac{3}{4}=4\frac{1}{4}$
$11-\frac{11}{100}=10\frac{100}{100}-\frac{11}{100}=10\frac{89}{100}$
$5-\frac{2}{7}=4\frac{7}{7}-\frac{2}{7}=4\frac{5}{7}$
$13-\frac{7}{10}=12\frac{10}{10}-\frac{7}{10}=12\frac{3}{10}$

#4
$6\frac{4}{7}+9\frac{3}{7}=15\frac{7}{7}=16$
$7\frac{1}{6}+8\frac{5}{6}=15\frac{6}{6}=16$
$14\frac{11}{29}+7\frac{18}{29}=21\frac{29}{29}=22$
$4\frac{2}{3}+7\frac{1}{3}=11\frac{3}{3}=12$
$15\frac{6}{11}+9\frac{5}{11}=24\frac{11}{11}=25$
$19\frac{8}{13}+6\frac{5}{13}=25\frac{13}{13}=26$