Question

помогите решит 1б и 2б!

Answer 1

$1)1 frac{1}{3} *3,4= frac{4}{3} * frac{34}{10} = frac{68}{15}$
$2) frac{68}{15} *2 frac{4}{7} = frac{68}{15} * frac{18}{7} = frac{408}{35}$
$3)1 frac{2}{7} *5 frac{1}{3} = frac{9}{7} * frac{16}{3} = frac{48}{7}$
$4) frac{48}{7} *1,7= frac{48}{7} * frac{17}{10} = frac{408}{35}$
$5) frac{408}{35} : frac{408}{35} =1$
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$1)2 frac{2}{7} *1 frac{1}{5} = frac{16}{7} * frac{6}{5} = frac{96}{35}$
$2) frac{96}{36} *3,8= frac{96}{35} * frac{38}{10} = frac{1824}{175}$
$3)2 frac{2}{5} *9 frac{1}{7} = frac{12}{5} * frac{64}{7} = frac{768}{35}$
$4)1,9* frac{768}{35} = frac{19}{10} * frac{768}{35} = frac{7296}{175}$
$5) frac{1824}{175} : frac{7296}{175} = frac{1824}{175} * frac{175}{7296} = frac{1}{4}$