\[\boxed{\mathbf{Стр.\ 42.\ }еуроки - ответы\ на\ пятёрку}\]
\[\boxed{\mathbf{44.}}\]
\[1)\ 11 - 3 = 8\ (мячей) - у\ \]
\[мальчиков,\ если\ бы\ было\ \]
\[поровну.\]
\[2)\ 8\ :2 = 4\ (мяча) - у\ Максима.\]
\[3)\ 4 + 3 = 7\ (мячей) - у\ Коли.\]
\[Ответ:4\ мяча\ и\ 7\ мячей.\]
\[\boxed{\mathbf{45.}}\]
\[14 \cdot (5 - 2) - 7 = 35\]
\[20\ :4 + 3 + 16 = 24\]
\[7 + 7 + 3 - 13 = 4\]
\[(4 - 4) \cdot 9 \cdot 7 = 0\]
\[\boxed{\mathbf{46.}}\]
\[41\ :6 = 6\ (ост.\ 5)\]
\[30\ :4 = 7\ (ост.2)\]
\[67\ :8 = 8\ (ост.3)\]
\[13\ :2 = 6\ (ост.1)\]
\[26\ :3 = 8\ (ост.2)\]
\[77\ :8 = 9\ (ост.5)\]
\[38\ :4 = 9\ (ост.2)\]
\[88\ :9 = 9\ (ост.7)\]
\[\boxed{\mathbf{47.}}\]
\[300 - 1 = 299\]
\[299 + 1 = 300\]
\[499 + 1 = 500\]
\[800 - 1 = 799\]
\[500 + 1 = 501\]
\[700 - 1 = 699\]
\[\boxed{\mathbf{48.}}\]
\[849 = 800 + 40 + 9\]
\[104 = 100 + 4\]
\[590 = 500 + 90\]
\[738 = 700 + 30 + 8\]