{"id":44,"date":"2022-04-12T04:37:09","date_gmt":"2022-04-12T04:37:09","guid":{"rendered":"http:\/\/4thclass.deltapublications.in\/?page_id=44"},"modified":"2025-09-06T05:27:24","modified_gmt":"2025-09-06T05:27:24","slug":"b-8-estimate-sums","status":"publish","type":"page","link":"https:\/\/4thclass.deltapublications.in\/index.php\/b-8-estimate-sums\/","title":{"rendered":"B.8 Estimate sums"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color has-huge-font-size\" style=\"color:#00056d;text-transform:uppercase\"><strong>Estimate sums<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div style=\"position: relative; width: 100%; height: 0; padding-top: 56.2500%;\n padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden;\n border-radius: 8px; will-change: transform;\">\n  <iframe loading=\"lazy\" style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;\"\n    src=\"https:\/\/www.canva.com\/design\/DAGwhyc33mk\/GVQMT8FyPMN2fua_kX9PGA\/watch?embed\" allowfullscreen=\"allowfullscreen\" allow=\"fullscreen\">\n  <\/iframe>\n<\/div>\n<a href=\"https:&#x2F;&#x2F;www.canva.com&#x2F;design&#x2F;DAGwhyc33mk&#x2F;GVQMT8FyPMN2fua_kX9PGA&#x2F;watch?utm_content=DAGwhyc33mk&amp;utm_campaign=designshare&amp;utm_medium=embeds&amp;utm_source=link\" target=\"_blank\" rel=\"noopener\">B.8 Estimate Sums<\/a> by Delta publications\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong>Key notes <\/strong> : <\/p>\n\n\n\n<div class=\"wp-block-group has-normal-font-size\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table has-normal-font-size\"><table class=\"has-text-color has-link-color has-fixed-layout\" style=\"color:#000020\"><tbody><tr><td>\ud83c\udf88<strong>Understanding Estimation<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li><strong>Estimation<\/strong>: The process of finding an approximate value rather than an exact answer.<\/li>\n\n\n\n<li><strong>Purpose<\/strong>: Helps in quickly assessing the magnitude of numbers and making reasonable guesses without performing exact calculations.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table has-normal-font-size\"><table class=\"has-text-color has-link-color has-fixed-layout\" style=\"color:#000020\"><tbody><tr><td>\ud83c\udf86<strong> Strategies for Estimating Sums<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Rounding Numbers<\/strong>:<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Round to the Nearest Ten<\/strong>: Round each number to the nearest ten and then add.<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Example<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-normal-font-size\">Numbers: 43 and 28<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Rounded Numbers: 40 (43) and 30 (28)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Estimated Sum: 40 + 30 = 70<\/li>\n<\/ul>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Rounding to the Nearest Hundred<\/strong>:<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Round to the Nearest Hundred<\/strong>: Round each number to the nearest hundred and then add.<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Example<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Numbers: 145 and 238<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Rounded Numbers: 100 (145) and 200 (238)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Estimated Sum: 100 + 200 = 300<\/li>\n<\/ul>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Using Compatible Numbers<\/strong>:<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Find Easy-to-Add Numbers<\/strong>: Choose numbers that are easy to add mentally.<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Example<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Numbers: 56 and 29<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Compatible Numbers: 60 (56) and 30 (29)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Estimated Sum: 60 + 30 = 90<\/li>\n<\/ul>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Estimating with Front-End Rounding<\/strong>:<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Add the Leading Digits<\/strong>: Focus on the most significant digits to estimate.<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Example<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Numbers: 167 and 389<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Front-End Digits: 100 (167) and 400 (389)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Estimated Sum: 100 + 400 = 500<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table has-normal-font-size\"><table class=\"has-text-color has-link-color has-fixed-layout\" style=\"color:#000020\"><tbody><tr><td>\ud83c\udf87<strong> Practice Problems<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Problem 1<\/strong>:<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Estimate the sum of 82 and 47<\/strong>.<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Solution<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-normal-font-size\">Round to the nearest ten: 80 (82) and 50 (47)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Estimated Sum: 80 + 50 = 130<\/li>\n<\/ul>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Problem 2<\/strong>:<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Estimate the sum of 254 and 168<\/strong>.<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Solution<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-normal-font-size\">Round to the nearest hundred: 300 (254) and 200 (168)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Estimated Sum: 300 + 200 = 500<\/li>\n<\/ul>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Problem 3<\/strong>:<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Estimate the sum of 74 and 29<\/strong>.<\/p>\n\n\n\n<p class=\"has-normal-font-size\"><strong>Solution<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-normal-font-size\">Use compatible numbers: 70 (74) and 30 (29)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li>Estimated Sum: 70 + 30 = 100<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table has-normal-font-size\"><table class=\"has-text-color has-link-color has-fixed-layout\" style=\"color:#000020\"><tbody><tr><td>\ud83e\udde8<strong> Tips for Effective Estimation<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list has-normal-font-size\">\n<li><strong>Choose the Best Rounding Strategy<\/strong>: Depending on the numbers, rounding to the nearest ten, hundred, or using compatible numbers may be most effective.<\/li>\n\n\n\n<li><strong>Check for Reasonableness<\/strong>: After estimating, ensure that the estimated sum makes sense in relation to the numbers being added.<\/li>\n\n\n\n<li><strong>Practice Regularly<\/strong>: Regular practice with different numbers helps improve estimation skills.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-large-font-size\" style=\"color:#105000\"><strong>Learn with an example<\/strong><\/p>\n\n\n\n<div class=\"wp-block-group has-background has-normal-font-size\" style=\"background-color:#f4a4f9\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group has-background-background-color has-background has-normal-font-size\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"has-text-color has-link-color has-normal-font-size wp-elements-ca2645e812cd6cafe0b05c3274321338\" style=\"color:#b00012\">\u25b6\ufe0f Estimate the sum by rounding each number to the nearest thousand and then adding.<\/p>\n\n\n\n<p class=\"has-text-align-center has-normal-font-size\">7,787 + 1,001<\/p>\n\n\n\n<p class=\"has-normal-font-size\">The sum is approximately___________.<\/p>\n<\/div><\/div>\n\n\n\n<p class=\"has-normal-font-size\">Round each number to the nearest thousand.<\/p>\n\n\n\n<p class=\"has-normal-font-size\">7,787 + 1,001 = ?<\/p>\n\n\n\n<p class=\"has-foreground-color has-text-color has-normal-font-size\"><strong>8,000 + 1,000 = ?<\/strong><\/p>\n\n\n\n<p>Now add:<\/p>\n\n\n\n<p class=\"has-normal-font-size\">8,000 + 1,000 = 9,000<\/p>\n\n\n\n<p class=\"has-normal-font-size\">The sum is about 9,000.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-background has-normal-font-size\" style=\"background-color:#99d2ec\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group has-background-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"has-text-color has-link-color wp-elements-e43ffacf4e7df4810256d72ef85fff05\" style=\"color:#b00012\">\u25b6\ufe0f Estimate the sum by rounding each number to the nearest thousand and then adding.<\/p>\n\n\n\n<p class=\"has-text-align-center has-normal-font-size\">9,383 + 5,687<\/p>\n\n\n\n<p class=\"has-normal-font-size\">The sum is approximately_________.<\/p>\n<\/div><\/div>\n\n\n\n<p>Round each number to the nearest thousand.<\/p>\n\n\n\n<p>9,383 + 5,687 = ?<\/p>\n\n\n\n<p class=\"has-text-color\" style=\"color:#02405f\"><strong>9,000 + 6,000 = ?<\/strong><\/p>\n\n\n\n<p>Now add:<\/p>\n\n\n\n<p>9,000 + 6,000 = 15,000<\/p>\n\n\n\n<p class=\"has-text-align-center has-normal-font-size\">The sum is about 15,000.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-background has-normal-font-size\" style=\"background-color:#e2c9fa\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group has-background-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color has-link-color wp-elements-2089a691c41abb1c0720d3a71934b161\" style=\"color:#b00012\">\ud83d\udd25Estimate the sum by rounding each number to the nearest hundred and then adding.<\/p>\n\n\n\n<p>666 + 711<\/p>\n\n\n\n<p>The sum is approximately&nbsp;&#8212;&#8212;&#8212;.<\/p>\n<\/div><\/div>\n\n\n\n<p>Round each number to the nearest hundred.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"670\" height=\"200\" src=\"https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/07\/Untitled_design__3_-removebg-preview-1.png\" alt=\"\" class=\"wp-image-8094\" style=\"width:352px;height:105px\" srcset=\"https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/07\/Untitled_design__3_-removebg-preview-1.png 670w, https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/07\/Untitled_design__3_-removebg-preview-1-300x90.png 300w\" sizes=\"auto, (max-width: 670px) 100vw, 670px\" \/><\/figure><\/div>\n\n\n<p>Now add :<\/p>\n\n\n\n<p>700 + 700 = 1,400<\/p>\n\n\n\n<p>The sum is about 1,400.<\/p>\n<\/div><\/div>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\">Let&#8217;s practice!<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/76137\/170\/433\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-64.png\" alt=\"\" class=\"wp-image-6375\" srcset=\"https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-64.png 500w, https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-64-300x300.png 300w, https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-64-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/76131\/779\/208\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-64.png\" alt=\"\" class=\"wp-image-6376\" srcset=\"https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-64.png 500w, https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-64-300x300.png 300w, https:\/\/4thclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-64-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Estimate sums B.8 Estimate Sums by Delta publications Key notes : \ud83c\udf88Understanding Estimation \ud83c\udf86 Strategies for Estimating Sums Rounding Numbers: Round to the Nearest Ten: Round each number to the nearest ten and then add. Example: Rounding to the Nearest Hundred: Round to the Nearest Hundred: Round each number to the nearest hundred and then<a class=\"more-link\" href=\"https:\/\/4thclass.deltapublications.in\/index.php\/b-8-estimate-sums\/\">Continue reading <span class=\"screen-reader-text\">&#8220;B.8 Estimate sums&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-44","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=44"}],"version-history":[{"count":24,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/44\/revisions"}],"predecessor-version":[{"id":15881,"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/44\/revisions\/15881"}],"wp:attachment":[{"href":"https:\/\/4thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}