\[\mathbf{Страница\ 39.}\]
\[\boxed{\mathbf{4.}}\]
\[\textbf{а)}\ (45 \cdot 2)\ :(37 - 28) =\]
\[= 90\ :9 = 10\]
\[\textbf{б)}\ (48 + 52) \cdot (18 + 12) =\]
\[= 100 \cdot 30 = 3000\]
\[\boxed{\mathbf{5.}}\]
\[Числовые\ выражения:\]
\[1)\ 5 \cdot 6 + 12\]
\[2)\ 55 + 16\ :4\]
\[3)\ 99 - 11\]
\[Буквенные\ выражения:\]
\[1)\ 5 \cdot a + 6\]
\[2)\ b - c + a\]
\[3)\ 15 \cdot k\ :8\]
\[\boxed{\mathbf{6.}}\]
\[\textbf{а)}\ 896 + 1347\]
\[\textbf{б)}\ 2156 - 749\]
\[\textbf{в)}\ 96 \cdot 42\]
\[\textbf{г)}\ 5076\ :12\]
\[\boxed{\mathbf{7.}}\]
\[\textbf{а)}\ b + 340\]
\[\textbf{б)}\ a \cdot x\]
\[\textbf{в)}\ 78\ :c\]
\[\textbf{г)}\ y - b\]
\[\boxed{\mathbf{8.}}\]
\[a - (b + c) = a - b - c\]
\[a\] | \[36\] | \[100\] | \[52\ 200\] | \[38\ 584\] | \[29\ 458\] | \[80\ 202\] |
---|---|---|---|---|---|---|
\[b\] | \[30\] | \[40\] | \[200\] | \[1584\] | \[1458\] | \[80\ 002\] |
\[c\] | \[2\] | \[30\] | \[900\] | \[2500\] | \[4500\] | \[77\] |
\[b + c\] | \[32\] | \[70\] | \[1100\] | \[4084\] | \[5958\] | \[80\ 079\] |
\[a - (b + c)\] | \[4\] | \[30\] | \[51\ 100\] | \[34\ 500\] | \[23\ 500\] | \[123\] |
\[a - b - c\] | \[4\] | \[30\] | \[51\ 100\] | \[34\ 500\] | \[23\ 500\] | \[123\] |
\[\boxed{\mathbf{9.}}\]
\[9 - y\]
\[y = 0;1;2;3;4;5;6;7;8;9.\]
\[x - 5\]
\[x = 0;1;2;3;4;5.\]
\[200 + b\]
\[b = 0;1;2;\ldots\ldots - любое\ число.\]