\[Страница\ 37.\]
\[\boxed{\mathbf{6}.}\]
\[\textbf{а)}\ 200\ 000\ 000 + 100\ 000 +\]
\[+ 4000 + 200 + 6 =\]
\[= 200\ 104\ 206\]
\[\textbf{б)}\ 50\ 000\ 000 + 8\ 000\ 000 +\]
\[+ 10\ 000 + 900 = 58\ 010\ 900\]
\[18.\ Делители\ и\ кратные\]
\[\boxed{\mathbf{1}.}\]
\[Делители\ числа\ 48:\]
\[1,\ 3,\ 6,\ 8,\ 12,\ 16,\ 24,\ 48.\]
\[\boxed{\mathbf{2}.}\]
\[\textbf{а)}\ Делители\ 12:\]
\[1,\ 2,\ 3,\ 4,\ 6,\ 12.\]
\[\textbf{б)}\ Делители\ 18:\]
\[1,\ 2,\ 3,\ 6,\ 9,\ 18.\]
\[\textbf{в)}\ Делители\ 33:\]
\[1,\ 3,\ 11,\ 33.\]
\[\textbf{г)}\ Делители\ 42:\]
\[1,\ 2,\ 3,\ 6,\ 7,\ 14,\ 21,\ 42.\]
\[\boxed{\mathbf{3}.}\]
\[Простые\ числа:\]
\[11,\ 13,\ 17,\ 19,\ 23,\ 29,\ 31,\ 37,\ 39.\]
\[\boxed{\mathbf{4}.}\]
\[Кратны\ числу\ 4:\]
\[4,\ 12,\ 20,\ 48,\ 56.\]
\[\boxed{\mathbf{5}.}\]
\[\textbf{а)}\ Кратны\ числу\ 6:\]
\[6,\ 12,\ 18,\ 24,\ 30,\ 36,\ 42,\ 48.\]
\[\textbf{б)}\ Кратны\ числу\ 7:\]
\[7,\ 14,\ 21,\ 28,\ 35,\ 42,\ 49.\]
\[\boxed{\mathbf{6}.}\]
\[\textbf{а)}\ 2\ и\ 3:\]
\[6.\]
\[\textbf{б)}\ 2\ и\ 4:\]
\[4.\]
\[\textbf{в)}\ 4\ и\ 6:\]
\[12.\]
\[\boxed{\mathbf{7}.}\]
\[\textbf{а)}\ 12\ и\ 18:\]
\[1,\ 2,\ 3,\ 6.\]
\[\textbf{б)}\ 20\ и\ 30:\]
\[1,\ 2,\ 5,\ 10.\]