2.263 Вычислите: а) \(\frac{3}{4}\) · 2; б) \(\frac{9}{12}\) · 4; в) \(\frac{7}{15}\) · 15; г) \(\frac{11}{15}\) · 7.

a) \(\frac{3}{4}\) · 2 = \(\frac{3 \cdot 2}{4}\) = \(\frac{6}{4}\) = \(\frac{3}{2}\) = 1\(\frac{1}{2}\)

Ответ: 1\(\frac{1}{2}\)

б) \(\frac{9}{12}\) · 4 = \(\frac{9 \cdot 4}{12}\) = \(\frac{36}{12}\) = 3

Ответ: 3

в) \(\frac{7}{15}\) · 15 = \(\frac{7 \cdot 15}{15}\) = 7

Ответ: 7

г) \(\frac{11}{15}\) · 7 = \(\frac{11 \cdot 7}{15}\) = \(\frac{77}{15}\) = 5\(\frac{2}{15}\)

Ответ: 5\(\frac{2}{15}\)