Решебник по математике 6 класс Мерзляк ФГОС Решаем устно параграф 29

 

\[\boxed{\mathbf{Решаем}\mathbf{\ }\mathbf{устно}\mathbf{\ }\mathbf{параграф}\mathbf{\ }\mathbf{29}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[\boxed{\mathbf{1.}}\]

\[1)\ 36,6 + 2,3 = 38,9{^\circ}\]

\[2)\ 38,9 - 1,8 = 37,1{^\circ}\]

\[\boxed{\mathbf{2.}}\]

\[1)\frac{1}{3}x = 5\]

\[x = 5 \cdot 3\]

\[x = 15.\]

\[2)\ 3x = 5\]

\[x = 5\ :3\]

\[x = \frac{5}{3} = 1\frac{2}{3}.\]

\[3)\ 3x = \frac{1}{5}\]

\[x = \frac{1}{5 \cdot 3}\]

\[x = \frac{1}{15}.\]

\[4)\frac{1}{3}x = \frac{1}{5}\]

\[x = \frac{1 \cdot 3}{5 \cdot 1}\]

\[x = \frac{3}{5}.\]

\[\boxed{\mathbf{3.}}\]

\[\boxed{\mathbf{4.}}\]

\[4 + 3 + 2 + 1 = 10\ отрезков.\]

\[\boxed{\mathbf{1.}}\]

\[\mathbf{Левее\ расположено\ число:}\]

\[1) - 15;\]

\[2) - 7;\]

\[3) - 3,2.\]

\[\boxed{\mathbf{2.}}\]

\[1)\ |1,9| + | - 11| = 1,9 + 11 =\]

\[= 12,9\]

\[2)\ | - 20| - | - 12,4| = 20 -\]

\[- 12,4 = 7,6\]

\[3)\ |0,7| \cdot | - 0,8| =\]

\[= 0,7 \cdot 0,8 = 0,56\]

\[4)\ | - 4,8|\ :|8| =\]

\[= 4,8\ :8 = 0,6\]

\[\boxed{\mathbf{3.}}\]

\[1)\ | - 4| = 4;\ \ \ \ \ \]

\[|6| = 6 \Longrightarrow | - 4| < |6|\]

\[2)\ | - 5| = 5;\ \ \ \]

\[\text{\ \ }| - 12| = 12 \Longrightarrow | - 5| < | - 12|\]

\[3)\ |3,8| = 3,8;\ \ \ \]

\[\ |4,6| = 4,6 \Longrightarrow |3,8| < |4,6|\]

\[4)\ | - 2,4| = 2,4;\ \]

\[\text{\ \ }|5,1| = 5,1 \Longrightarrow | - 2,4| < |5,1|\]

\[\boxed{\mathbf{4.}}\]

\[|a| < 5,3;\ \ \ \ \ \ a \in Z:\]

\[a = \{ - 5, - 4, - 3, - 2, - 1,0,\ 1,\ 2,\ 3,\ 4,\ 5\}.\]