Question

64 1/4-25 5/7+6 3/14=. 12 7/10- 5 3/4+6 1/5=.
42 7/15-9 3/4+5 11/12=. Пжжж помогииеее

Answer 1

1)

$64 \frac{1}{4} - 25 \frac{5}{7} + 6 \frac{3}{14} = \frac{257}{4} - \frac{180}{7} + \frac{87}{14} = \frac{1799}{28} - \frac{720}{28} + \frac{174}{28} = \frac{1253}{28} = 44 \frac{21}{28} = 44 \frac{3}{4}$

2)

$12 \frac{7}{10} - 5 \frac{3}{4} + 6 \frac{1}{5} = \frac{127}{10} - \frac{23}{4} + \frac{31}{5} = \frac{254}{20} - \frac{115}{20} + \frac{124}{20} = \frac{263}{20} = 13 \frac{3}{20}$

3)

$42 \frac{7}{15} - 9 \frac{3}{4} + 5 \frac{11}{12} = \frac{637}{15} - \frac{39}{4} + \frac{71}{12} = \frac{2548}{60} - \frac{585}{60} + \frac{355}{60} = \frac{2318}{60} = 38 \frac{38}{60} = 38 \frac{19}{30}$