Question

математика помогите пж номер 575

Answer 1

$ttdisplaystyle 1) frac{1}{4} cdot frac{2}{3} = frac{1 cdot 2}{4 cdot 3} = frac{2}{12} = frac{1}{6} \\ 2) frac{4}{9} cdot frac{1}{2} = frac{4 cdot 1}{9 cdot 2} = frac{4}{18} = frac{2}{9} \\ 3)  frac{2}{3} cdot frac{3}{8} = frac{2 cdot 3}{3 cdot 8} = frac{6}{24} = frac{1}{4} \\ 4) frac{5}{12} cdot frac{8}{9} = frac{5 cdot 8}{12 cdot 9} = frac{40}{108} = frac{10}{27} \\ 5) frac{15}{16} cdot frac{8}{25} = frac{15 cdot 8}{16 cdot 25} = frac{120}{400} = frac{3}{10} \\ 6) frac{1}{2} cdot frac{2}{3} = frac{1 cdot 2}{2 cdot 3} = frac{2}{6} = frac{1}{3} \\ 7) frac{3}{4} cdot frac{1}{6} = frac{3 cdot 1}{4 cdot 6} = frac{3}{24} = frac{1}{8} \\ 8) frac{7}{15} cdot frac{5}{7} = frac{7 cdot 5}{15 cdot 7} = frac{35}{105} = frac{1}{3}$