\[Страница\ 45.\]
\[\boxed{\mathbf{5.}}\]
\[\mathbf{а)}\]
\[x\] | \[10\] | \[100\] | \[1000\] |
---|---|---|---|
\[7,48\] | \[74,8\] | \[748\] | \[7480\] |
\[0,19\] | \[1,9\] | \[19\] | \[190\] |
\[4,5\] | \[45\] | \[450\] | \[4500\] |
\[\mathbf{б)\ }\]
\[x\] | \[100\] | \[10\] | \[1000\] |
---|---|---|---|
\[5,6\] | \[560\] | \[56\] | \[5600\] |
\[8,34\] | \[834\] | \[83,4\] | \[8340\] |
\[0,89\] | \[89\] | \[8,9\] | \[890\] |
\[\boxed{\mathbf{6.}}\]
\[\textbf{а)}\ 708,3\ :100 = 7,083\]
\[\textbf{б)}\ 5634,95\ :1000 = 5,63495\]
\[\textbf{в)}\ 970\ :100 = 9,7\]
\[\textbf{г)}\ 2811,01\ :1000 = 2,81101\]
\[\textbf{д)}\ 589,3\ :10\ 000 = 0,05893\]
\[\textbf{е)}\ 642,8\ :10000 = 0,06428\]
\[\boxed{\mathbf{7.}}\]
\[\boxed{\mathbf{8.}}\]
\[\textbf{а)}\ (56,6 - 17,4) - 25,39 =\]
\[= 39,2 - 25,39 = 13,81 -\]
\[второе\ число.\]
\[Ответ:13,81.\]
\[\textbf{б)}\ 24,9 + (24,9 + 19,75) +\]
\[+ (24,9 + 9,75 - 1,9) =\]
\[= 24,9 + 34,65 + 32,75 =\]
\[= 92,3\ (кг) - масса\ всех\ трех\ \]
\[отливок.\]
\[Ответ:92,3\ кг.\]