Question

ПОМОГИТЕ РЕШИТЬ ПРИМЕРЫ ПОЖАЛУЙСТА! !!
7*(2/3); (4/9)
23/45:(2/5-2/15)​

Answer 1

$7 times frac{2}{3} div frac{4}{9} =frac{14}{3} div frac{4}{9} = \ = frac{14}{3} times frac{9}{4} = frac{7 times 3}{1 times 2} = frac{21}{2} = 10 frac{1}{2} .$

$frac{23}{45} div ( frac{2}{5} - frac{2}{15})= \ = frac{23}{45} div ( frac{6}{15} - frac{2}{15})= \ = frac{23}{45} div frac{4}{15} = frac{23}{45} times frac{15}{4} = \ = frac{23 times 1}{3 times 4} = frac{23}{12} = 1 frac{11}{12} .$