\[Страница\ 69.\]
\[13.\ Нахождение\ дроби\ от\ числа\]
\[\boxed{\mathbf{1.}}\]
\[Умножить.\]
\[\boxed{\mathbf{2.}}\]
\[600\] | \[400\] | \[180\] | \[25\] | \[5\] | \[1\] | \[\frac{1}{2}\] | \[\frac{1}{4}\] | \[\frac{2}{5}\] | \[1\frac{1}{2}\] | |
---|---|---|---|---|---|---|---|---|---|---|
\[\frac{3}{5}\] | \[360\] | \[240\] | \[108\] | \[15\] | \[3\] | \[\frac{3}{5}\] | \[0,3\] | \[0,15\] | \[0,24\] | \[0,9\] |
\[0,2\] | \[120\] | \[80\] | \[36\] | \[5\] | \[1\] | \[0,2\] | \[0,1\] | \[0,05\] | \[0,08\] | \[0,3\] |
\[0,5\] | \[300\] | \[200\] | \[90\] | \[12,5\] | \[2,5\] | \[0,5\] | \[0,25\] | \[0,125\] | \[0,2\] | \[0,75\] |
\[1\%\] | \[6\] | \[4\] | \[1,8\] | \[0,25\] | \[0,05\] | \[0,01\] | \[0,005\] | \[0,0025\] | \[0,004\] | \[0,015\] |
\[10\%\] | \[60\] | \[40\] | \[18\] | \[2,5\] | \[0,5\] | \[0,1\] | \[0,05\] | \[0,025\] | \[0,04\] | \[0,15\] |
\[20\%\] | \[120\] | \[80\] | \[36\] | \[5\] | \[1\] | \[0,2\] | \[0,1\] | \[0,05\] | \[0,08\] | \[0,3\] |
\[25\%\] | \[150\] | \[100\] | \[45\] | \[6,25\] | \[1,25\] | \[0,25\] | \[0,125\] | \[0,0625\] | \[0,1\] | \[0,375\] |
\[\boxed{\mathbf{3.}}\]
\[120 \cdot \frac{2}{3} = 40 \cdot 2 = 80\ (орехов) -\]
\[у\ первого\ мальчика.\]
\[80 \cdot \frac{1}{5} = 16\ (орехов) - у\ \]
\[второго\ мальчика.\]
\[120 - 80 - 16 = 120 - 96 =\]
\[= 24\ (ореха) - у\ третьего\ \]
\[мальчика.\]
\[Ответ:80,\ 16,\ 24\ ореха.\]