Вычислите произведение:
а) $1\frac{1}{5} * 2$;
б) $2\frac{1}{5} * 3$;
в) $8 * 3\frac{1}{4}$;
г) $3\frac{2}{7} * 8$;
д) $2 * 5\frac{3}{4}$;
е) $2\frac{4}{5} * 9$;
ж) $12 * 5\frac{2}{3}$;
з) $21\frac{1}{9} * 9$.
$1\frac{1}{5} * 2 = 2\frac{2}{5}$
$2\frac{1}{5} * 3 = 6\frac{3}{5}$
$8 * 3\frac{1}{4} = 24\frac{8}{4} = 24 + 2 = 26$
$3\frac{2}{7} * 8 = 24\frac{16}{7} = 24 + 2\frac{2}{7} = 26\frac{2}{7}$
$2 * 5\frac{3}{4} = 10\frac{6}{4} = 10 + 1\frac{2}{4} = 11\frac{2}{4} = 11\frac{1}{2}$
$2\frac{4}{5} * 9 = 18\frac{36}{5} = 18 + 7\frac{1}{5} = 25\frac{1}{5}$
$12 * 5\frac{2}{3} = 60\frac{24}{3} = 60 + 8 = 68$
$21\frac{1}{9} * 9 = 189\frac{9}{9} = 189 + 1 = 190$
Пожауйста, оцените решение