Question

Приведи дроби:а) 4/9,5/6,7/2 к знаменателю 18 б) Приведи дроби:7/8,5/16,21/40 к знаменателю 80

Answer 1

а)4/9=8/18
5/6=15/18
7/2=63/18
б) 7/8=70/80
5/16=25/80
21/40=42/80

Answer 2

$a) frac{4}{9}= frac{4cdot2}{9cdot2}= frac{8}{18} \ \ frac{5}{6}= frac{5cdot3}{6cdot3}= frac{15}{18} \ \ frac{7}{2}= frac{7cdot9}{2cdot9}= frac{63}{18} \ \ b) frac{7}{8}= frac{7cdot10}{8cdot10}= frac{70}{80} \ \ frac{5}{16}= frac{5cdot5}{16cdot5}= frac{25}{80} \ \ frac{21}{40}= frac{21cdot2}{40cdot2}= frac{42}{80}$