Question

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Answer 1

$3-1 \frac{7}{9} =2 \frac{9}{9} -1 \frac{7}{9} =1 \frac{2}{9} \\ 3 \frac{1}{6} -1 \frac{7}{15} =3 \frac{5}{30} -1 \frac{14}{30} =2 \frac{35}{30}-1 \frac{14}{30} =1 \frac{21}{30}=1 \frac{7}{10} \\ 3 \frac{7}{15} -1 \frac{5}{6} =3 \frac{14}{30}-1 \frac{25}{30} =2 \frac{44}{30}-1 \frac{25}{30} -1 \frac{19}{30} \\ 12 \frac{3}{7} -3 \frac{1}{6} =12 \frac{18}{42} -3 \frac{7}{42} =9 \frac{11}{42} \\ 4+2 \frac{1}{5} =6 \frac{1}{5} \\ \\12= \frac{60}{5}$