Б. 27 = 34 7 = 214 7 = 27 1)35-10-310-10-210-10-2 = 2)641-18-678-78 10 3)7- = 7 2 4) 3 - - 15 10 5) 4 5 0000000 = 3 1=4 15 5 12 9 1 12 - 17 9 8 2 3 1 www 2 2 12 12 12 3

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Accepted Answer

$$3\frac{2}{5} - \frac{7}{10} = 3\frac{4}{10} - \frac{7}{10} = 2\frac{14}{10} - \frac{7}{10} = 2\frac{7}{10}$$
$$6\frac{4}{9} - \frac{11}{18} = 6\frac{8}{18} - \frac{11}{18} = 5\frac{26}{18} - \frac{11}{18} = 5\frac{15}{18} = 5\frac{5}{6}$$
$$7\frac{1}{4} - \frac{5}{6} = 7\frac{3}{12} - \frac{10}{12} = 6\frac{15}{12} - \frac{10}{12} = 6\frac{5}{12}$$
$$3\frac{2}{15} - \frac{3}{10} = 3\frac{4}{30} - \frac{9}{30} = 2\frac{34}{30} - \frac{9}{30} = 2\frac{25}{30} = 2\frac{5}{6}$$
$$4\frac{5}{12} - 1\frac{3}{4} = 4\frac{5}{12} - 1\frac{9}{12} = 3\frac{17}{12} - 1\frac{9}{12} = 2\frac{8}{12} = 2\frac{2}{3}$$