4.128. Восстановите запись: А) 2/3 = □/6 = □/18 = □/36; В) 1/3 = 2/□ = 3/□ = 4/□ = 5/□ = 6/□; Д) 4/5 = □/10 = □/15 = □/25 = □/75 = □/100; Е) 5/6 = □/12 = 25/□ = □/36 = 50/□ = □/66; З) 60/100 = □/10 = □/5.

Чтобы получить равные дроби, умножаем или делим числитель и знаменатель на одно и то же число.

А) \(\frac{2}{3}=\) \(\frac{4}{6}\) \(=\) \(\frac{12}{18}\) \(=\) \(\frac{24}{36}\).

В) \(\frac{1}{3}=\) \(\frac{2}{6}\) \(=\) \(\frac{3}{9}\) \(=\) \(\frac{4}{12}\) \(=\) \(\frac{5}{15}\) \(=\) \(\frac{6}{18}\).

Д) \(\frac{4}{5}=\) \(\frac{8}{10}\) \(=\) \(\frac{12}{15}\) \(=\) \(\frac{20}{25}\) \(=\) \(\frac{60}{75}\) \(=\) \(\frac{80}{100}\).

Е) \(\frac{5}{6}=\) \(\frac{10}{12}\) \(=\) \(\frac{25}{30}\) \(=\) \(\frac{30}{36}\) \(=\) \(\frac{50}{60}\) \(=\) \(\frac{55}{66}\).

З) \(\frac{60}{100}=\) \(\frac{6}{10}\) \(=\) \(\frac{3}{5}\).