{"id":2364,"date":"2020-12-22T10:49:11","date_gmt":"2020-12-22T05:19:11","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=2364"},"modified":"2020-12-22T18:02:17","modified_gmt":"2020-12-22T12:32:17","slug":"decimal-representation-rational-numbers","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/decimal-representation-rational-numbers\/","title":{"rendered":"Decimal Representation Of Rational Numbers"},"content":{"rendered":"
Example 1:<\/strong>\u00a0 \u00a0\u00a0Express \\(\\frac { 7 }{ 8 }\\)\u00a0in the decimal form by long division method. Example 2:<\/strong>\u00a0 \u00a0\u00a0Convert \\(\\frac { 35 }{ 16 }\\)\u00a0into decimal form by long division\u00a0 method. Example 3:<\/strong>\u00a0 \u00a0\u00a0Express \\(\\frac { 2157 }{ 625 }\\)\u00a0in the decimal form. Example 4:<\/strong>\u00a0 \u00a0\u00a0Express \\(\\frac { -17 }{ 8 }\\)\u00a0in decimal form by long division method. Example 5:<\/strong>\u00a0 \u00a0\u00a0Find the decimal representation of \\(\\frac { 8 }{ 3 }\\) . Example 6:<\/strong>\u00a0 \u00a0\u00a0Express \\(\\frac { 2 }{ 11 }\\)\u00a0as a decimal fraction. Example 7:<\/strong>\u00a0 \u00a0\u00a0Find the decimal representation of\u00a0\\(\\frac { -16 }{ 45 }\\) Example 8:<\/strong>\u00a0 \u00a0\u00a0Find the decimal representation of\u00a0\\(\\frac { 22 }{ 7 }\\)
\nSolution:<\/strong> \u00a0 \u00a0We have,
\n
\n\u2234\u00a0\\(\\frac { 7 }{ 8 }\\) = 0.875<\/p>\n
\nSolution: \u00a0 \u00a0<\/strong>We have,\u00a0\u00a0<\/strong>
\n<\/p>\n
\nSolution: \u00a0 \u00a0<\/strong>We have,
\n<\/p>\n
\nSolution: \u00a0 \u00a0<\/strong>In order to convert \\(\\frac { -17 }{ 8 }\\)\u00a0in the decimal form, we first express \\(\\frac { 17 }{ 8 }\\) in the decimal form and the decimal form of \\(\\frac { -17 }{ 8 }\\) will be negative of the decimal form of \\(\\frac { 17 }{ 8 }\\)
\nwe have,
\n<\/p>\n
\nSolution: \u00a0 \u00a0<\/strong>By long division, we have
\n<\/p>\n
\nSolution: \u00a0 \u00a0<\/strong>By long division, we have
\n<\/p>\n
\nSolution: \u00a0 \u00a0<\/strong>By long division, we have
\n<\/p>\n
\nSolution: \u00a0 \u00a0<\/strong>By long division, we have
\n
\n
\nSo division of rational number gives decimal expansion. This expansion represents two types
\n(A)<\/strong> Terminating (remainder = 0)
\n
\nSo these are terminating and non repeating (recurring)
\n(B)<\/strong> Non terminating recurring (repeating)
\n(remainder \u2260\u00a00, but equal to devidend)
\n
\nThese expansion are not finished but digits are continusely repeated so we use a line on those digits, called bar \\((\\bar{a})\\).
\nSo we can say that rational numbers are of the form either terminating, non repeating or non terminating repeating (recurring).<\/p>\n