\[Страница\ 27.\]
\[\boxed{\mathbf{14.}}\]
\[6 = 2 + 2 + 2\]
\[9 = 3 + 3 + 3\]
\[15 = 5 + 5 + 5\]
\[12 = 6 + 6\]
\[18 = 6 + 6 + 6\]
\[16 = 4 + 4 + 4 + 4\]
\[14 = 7 + 7\]
\[20 = 5 + 5 + 5 + 5\]
\[\boxed{\mathbf{15.}}\]
\[c\] | \[9\] | \[18\] | \[23\] | \[40\] |
---|---|---|---|---|
\[c + 8\] | \[17\] | \[26\] | \[31\] | \[48\] |
\[k\] | \[16\] | \[13\] | \[22\] | \[50\] |
---|---|---|---|---|
\[k - 7\] | \[9\] | \[6\] | \[15\] | \[43\] |
\[\boxed{\mathbf{16.}}\]
\[\boxed{\mathbf{17.}}\]
\[1)\ 13 - 5 = 8\ (книг) - было\ \]
\[на\ верхней\ полке.\]
\[2)\ 13 - 7 = 6\ (книг) - было\ \]
\[на\ нижней\ полке.\]
\[Ответ:8\ книг\ и\ 6\ книг.\]