\n<\/strong>There are some basic rules that need to be followed for rounding numbers.
\nWhen rounding a number, you first need to ask: what are you rounding it to? Numbers can be rounded to the nearest ten, the nearest hundred, the nearest thousand, and so on.<\/p>\n
We first need to know what our rounding digit is. This digit is the one that will ultimately be affected.
\nAfter this, we need to check the digit to the right of this place which will decide the fate of the rounding digit.
\nIf the number you are rounding is followed by 0, 1, 2, 3, or 4, we do not change the rounding digit. However, all the digits to the right of the rounding digit are changed to 0.
\nIf the number you are rounding is followed by 5, 6, 7, 8, or 9, we increase the rounding digit by 1, and all the digits to the right of the rounding digit are changed to 0.<\/p>\n
Rounding Numbers to the Nearest Ten<\/strong> Rounding Numbers to the Nearest Hundred<\/strong> 74 (Round to the nearest 10) \u2192 70<\/p>\n 48 (Round to the nearest 10) \u2192 50<\/p>\n Estimated Difference: Estimate 77 – 44.<\/strong><\/span> Estimate 833 – 649.<\/strong><\/span> A superstore purchased 74 mangoes. Out of the total mangoes, 14 were rotten. About how many mangoes were not rotten?<\/strong><\/span> [vc_section full_width=”stretch_row” content_placement=”middle” css=”.vc_custom_1633364343825{background-image: url(https:\/\/oryxlearning.com\/learn\/wp-content\/uploads\/2021\/10\/10-min-scaled.jpg?id=2121) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}” el_id=”bg-sec”][vc_row full_width=”stretch_row_content” el_class=”faaaq”][vc_column width=”1\/12″][\/vc_column][vc_column width=”1\/2″][vc_row_inner content_placement=”middle” el_class=”topheadingg”][vc_column_inner width=”1\/6″][vc_single_image image=”2283″ img_size=”full”][\/vc_column_inner][vc_column_inner width=”5\/6″][vc_column_text] Estimate Differences [\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_column_text el_class=”headingnew”]Concept[\/vc_column_text][vc_column_text]Estimation of a number is a reasonable guess of the actual value to make calculations easier and realistic. This is obtained by rounding off the numbers involved in the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"yoast_head":"\n
\nRounding numbers to the nearest ten means we need to check the digit to the right of the tens place, that is the ones place. For example, when we round the number 3186 to the nearest ten, it becomes 3190.<\/p>\n
\nRounding numbers to the nearest hundred means we need to check the digit to the right of the hundreds place, that is, the tens place. For example, when 8453 is rounded to the nearest hundred, it becomes 8500.[\/vc_column_text][vc_column_text el_class=”headingnew”]Example[\/vc_column_text][vc_column_text]Estimate<\/span> 74 – 48.<\/strong>[\/vc_column_text][vc_column_text el_class=”headingnew”]Solution[\/vc_column_text][vc_column_text]To estimate the difference, round off all the numbers to the same place value, then subtract them accordingly.<\/p>\n
\n70 – 50 = 20<\/strong><\/span>
\n[\/vc_column_text][vc_column_text el_class=”headingnew”]Practice Estimate Differences[\/vc_column_text][vc_row_inner el_class=”boxxborder”][vc_column_inner][vc_column_text]\nPractice Problem 1<\/h5>\n
\nRound both numbers to the nearest ten and then subtract.
\n![\"\"](\"https:\/\/oryxlearning.com\/learn\/wp-content\/uploads\/2021\/11\/13-7.png\")
<\/a>[\/vc_column_text][vc_single_image image=”2159″ img_size=”full” alignment=”right” onclick=”custom_link” link=”https:\/\/en.oryxlearning.com\/question\/maths\/3rd-grade\/estimate-differences”][\/vc_column_inner][\/vc_row_inner][vc_empty_space][vc_row_inner el_class=”boxxborder”][vc_column_inner][vc_column_text]\nPractice Problem 2<\/h5>\n
\nRound both numbers to the nearest hundred and then subtract.
\n![\"\"](\"https:\/\/oryxlearning.com\/learn\/wp-content\/uploads\/2021\/11\/14-3.png\")
<\/a>[\/vc_column_text][vc_single_image image=”2159″ img_size=”full” alignment=”right” onclick=”custom_link” link=”https:\/\/en.oryxlearning.com\/question\/maths\/3rd-grade\/estimate-differences”][\/vc_column_inner][\/vc_row_inner][vc_empty_space][vc_row_inner el_class=”boxxborder”][vc_column_inner][vc_column_text]\nPractice Problem 3<\/h5>\n
\nRound both numbers to the nearest ten and then subtract.
\n![\"\"](\"https:\/\/oryxlearning.com\/learn\/wp-content\/uploads\/2021\/11\/15-3.png\")
<\/a>[\/vc_column_text][vc_single_image image=”2159″ img_size=”full” alignment=”right” onclick=”custom_link” link=”https:\/\/en.oryxlearning.com\/question\/maths\/3rd-grade\/estimate-differences”][\/vc_column_inner][\/vc_row_inner][vc_empty_space][\/vc_column][vc_column width=”1\/3″ css=”.vc_custom_1633369011398{margin-bottom: 50px !important;}”][vc_row_inner el_class=”stickynotee”][vc_column_inner][vc_single_image image=”2265″ img_size=”full” alignment=”center” css_animation=”fadeIn” css=”.vc_custom_1633509989314{border-radius: 10px !important;}” el_class=”stickypin”][vc_column_text]Estimation<\/strong> means approximating a quantity to the required accuracy.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_column_text el_class=”boxxborder2″]Pre-requisite Skills<\/strong><\/span>
\nRounding Whole Numbers to Nearest Ten and Hundred<\/span><\/a>
\nRounding Whole Numbers to Nearest Thousand<\/span><\/a>
\nProblems Solving – Estimate or Exact Answer<\/span><\/a>
\nEstimate sum<\/span><\/a>
\nEstimating Sums by Rounding<\/span><\/a>
\nSolving Word Problems by Estimating Sums<\/span><\/a>[\/vc_column_text][vc_column_text el_class=”boxxborder2″ css=”.vc_custom_1637220049840{border-top-width: 6px !important;border-right-width: 6px !important;border-bottom-width: 6px !important;border-left-width: 6px !important;background-position: center !important;background-repeat: no-repeat !important;background-size: contain !important;border-left-color: #333399 !important;border-left-style: solid !important;border-right-color: #333399 !important;border-right-style: solid !important;border-top-color: #333399 !important;border-top-style: solid !important;border-bottom-color: #333399 !important;border-bottom-style: solid !important;border-radius: 35px !important;}”]Related Skills<\/strong><\/span>
\nEstimate Products<\/span><\/a>
\nEstimate Products of Fractions<\/span><\/a>
\nEstimate Products – Word Problems<\/span><\/a>
\nEstimate Quotients<\/span><\/a>
\nEstimating Decimals Sum and Difference<\/span><\/a>
\nRounding Fractions<\/span><\/a>
\nWord problems – Estimate fractions<\/span><\/a>
\nEstimate Sums and Difference of Mixed Numbers<\/span><\/a>[\/vc_column_text][vc_row_inner equal_height=”yes” el_class=”btninlinespacing”][vc_column_inner][vc_btn title=”Grade 1″ color=”warning” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F1st-grade%2Fmaths|title:Grade%201%20Math||”][vc_btn title=”Grade 2″ color=”danger” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F2nd-grade%2Fmaths|title:Grade%202%20Math||”][vc_btn title=”Grade 3″ color=”violet” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F3rd-grade%2Fmaths|title:Grade%203%20Math||”][vc_btn title=”Grade 4″ color=”blue” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F4th-grade%2Fmaths|title:Grade%204%20Math||”][vc_btn title=”Grade 5″ color=”green” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F5th-grade%2Fmaths|title:Grade%205%20Math||”][vc_btn title=”Grade 6″ color=”info” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F6th-grade%2Fmaths|title:Grade%206%20Math||”][vc_btn title=”Grade 7″ color=”vista-blue” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F7th-grade%2Fmaths|title:Grade%207%20Math||”][vc_btn title=”Grade 8″ color=”mulled-wine” link=”url:https%3A%2F%2Foryxlearning.com%2Fgrade%2F8th-grade%2Fmaths|title:Grade%208%20Math||”][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=”yes” el_class=”btninlinespacing”][vc_column_inner][vc_btn title=”Estimation” color=”warning” link=”url:https%3A%2F%2Fen.oryxlearning.com%2Ftopics%2Fmaths%2Festimation|title:Estimation||”][vc_btn title=”Word Problems” color=”danger” link=”url:https%3A%2F%2Fen.oryxlearning.com%2Ftopics%2Fmaths%2Fword-problems|title:Word%20Problems||”][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][\/vc_section]\n","protected":false},"excerpt":{"rendered":"