\[Стр.\ 33.\]
\[\boxed{\mathbf{10.}}\]
\[\textbf{а)}\ 920\ :4 = 230\ (г) - масса\]
\[\ \frac{1}{4}\ литра\ масла.\]
\[Ответ:230\ г.\]
\[\textbf{б)}\ 26 \cdot 4 = 104\ (км) - должен\ \]
\[проехать\ мотоциклист.\]
\[Ответ:104\ км.\]
\[\boxed{\mathbf{11.}}\]
\[\textbf{а)}\ 354 + 126 = 480\ :3 =\]
\[= 160 + 50 = 210\ :7 =\]
\[= 30\ :2 = 15\]
\[\textbf{б)}\ 320\ :40 = 8 \cdot 12 =\]
\[= 96 + 204 = 300\ :75 = 4\]
\[\textbf{в)}\ 386 + 214 = 600\ :8 =\]
\[= 75 - 45 = 30 \cdot 7 = 210\ :5 =\]
\[= 42\]
\[\textbf{г)}\ 800\ :25 = 32 \cdot 20 =\]
\[= 640 - 410 = 230\ :10 =\]
\[= 23 \cdot 5 = 115\]
\[\textbf{д)}\ 441 + 209 = 650 - 160 =\]
\[= 490\ :7 = 70 \cdot 5 = 350\ :35 =\]
\[= 10 \cdot 7 = 70\]
\[\textbf{е)}\ 900\ :150 = 6 \cdot 90 =\]
\[= 540 + 260 = 800\ :16 = 50\]