1)Приведите дробь 40/49 к знаменателю 343 и дробь 20/57 к знаменателю 228. 2)Привелите...

Решите задачу:

$1) \frac{40}{49}= \frac{40*7}{49*7}= \frac{280}{343}$
$\frac{20}{57}= \frac{20*4}{57*4} = \frac{80}{228}$

$2) \frac{38}{57} = \frac{38*6}{57*6} = \frac{228}{342} \\ \\ \frac{7}{9}= \frac{7*38}{9*38} = \frac{266}{342} \\ \\ \frac{5}{6}= \frac{5*57}{6*57}= \frac{285}{342}$

$\frac{46}{69} = \frac{46*15}{69*15}= \frac{690}{1035} \\ \\ \frac{7}{9}= \frac{7*115}{9*115}= \frac{805}{1035} \\ \\ \frac{2}{15} = \frac{2*69}{15*69}= \frac{138}{1035}$

$3) \frac{3}{7}= \frac{3*8}{7*8}= \frac{24}{56} \\ \\ \frac{1}{8}= \frac{1*7}{8*7} = \frac{7}{56} \\ \\ \frac{11}{14} = \frac{11*4}{14*4} = \frac{44}{56}$

$\frac{2}{11}= \frac{24}{132} \\\\ \frac{1}{6} = \frac{22}{132} \\ \\ \frac{31}{44} = \frac{93}{132}$