{"id":340,"date":"2022-04-11T05:53:02","date_gmt":"2022-04-11T05:53:02","guid":{"rendered":"http:\/\/2ndclass.deltapublications.in\/?page_id=340"},"modified":"2026-03-24T09:39:36","modified_gmt":"2026-03-24T09:39:36","slug":"s-9-addition-and-subtraction-balance-equations-up-to-100","status":"publish","type":"page","link":"https:\/\/2ndclass.deltapublications.in\/index.php\/s-9-addition-and-subtraction-balance-equations-up-to-100\/","title":{"rendered":"S.9 Addition and subtraction &#8211; balance equations &#8211; up to 100"},"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> Addition and subtraction &#8211; balance equations &#8211; up to 100<\/strong><\/h2>\n\n\n\n<p class=\"has-huge-font-size\"><strong>key notes :<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\u2b50 What is a Balance Equation?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>balance equation<\/strong> means both sides are <strong>equal (same value)<\/strong>.<\/li>\n\n\n\n<li>The <strong>equal sign (=)<\/strong> shows both sides are balanced.<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>25 + 15 = 40<\/li>\n\n\n\n<li>40 = 25 + 15 \u2714\ufe0f (both sides are equal)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\u2696\ufe0f Think of a Balance Scale<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Imagine a <strong>balance scale<\/strong> \u2696\ufe0f<\/li>\n\n\n\n<li>If both sides have the same weight \u2192 it is <strong>balanced<\/strong><\/li>\n\n\n\n<li>If not \u2192 it is <strong>not balanced<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\u2795\u2796 Using Addition and Subtraction<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>We use <strong>addition (+)<\/strong> and <strong>subtraction (\u2212)<\/strong> to make both sides equal<\/li>\n\n\n\n<li>Numbers are <strong>up to 100<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>30 + 20 = 50<\/li>\n\n\n\n<li>50 \u2212 10 = 40<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83d\udd0d Find the Missing Number<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sometimes a number is missing (\u25a1 or ___)<\/li>\n\n\n\n<li>We solve it to <strong>balance the equation<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Examples:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>25 + ___ = 60 \u2192 answer is <strong>35<\/strong><\/li>\n\n\n\n<li>___ \u2212 15 = 45 \u2192 answer is <strong>60<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83d\udd04 Check Both Sides<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solve each side separately<\/li>\n\n\n\n<li>Compare the answers<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>20 + 30 = 40 + 10<\/li>\n\n\n\n<li>Left side = 50<\/li>\n\n\n\n<li>Right side = 50 \u2714\ufe0f (Balanced)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\u274c True or False<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Decide if the equation is correct or not<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Examples:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>45 + 5 = 50 \u2714\ufe0f (True)<\/li>\n\n\n\n<li>70 \u2212 20 = 40 \u274c (False, correct answer is 50)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83e\udde0 Tips for Students<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Always <strong>calculate carefully<\/strong><\/li>\n\n\n\n<li>Use <strong>mental math<\/strong> or fingers if needed<\/li>\n\n\n\n<li>Check your answer again<\/li>\n\n\n\n<li>Keep numbers <strong>within 100<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">\ud83c\udfaf Learning Goal<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Understand that <strong>both sides must be equal<\/strong><\/li>\n\n\n\n<li>Solve simple addition and subtraction equations<\/li>\n\n\n\n<li>Find missing numbers easily<\/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-large-font-size\" style=\"background-color:#aeeed2\"><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-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color has-link-color wp-elements-0ccebbbd4fc56c3c5156450267e5712d\" style=\"color:#b00012\">\ud83d\udc49<strong> Which number makes the equation true?<\/strong><\/p>\n\n\n\n<p> 32 + ____&nbsp;&nbsp;= 81 \u2212 13<\/p>\n<\/div><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, subtract 81 \u2212 13:<\/li>\n\n\n\n<li>32 + ? = 81 \u2212 13<\/li>\n\n\n\n<li>32 + ? = 68<\/li>\n\n\n\n<li>Decide which number makes the addition number sentence true. You can subtract to find the answer.<\/li>\n\n\n\n<li>Subtract: 68 \u2212 32 = 36<\/li>\n\n\n\n<li>The missing number is 36.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-background has-large-font-size\" style=\"background-color:#a9b6f1\"><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-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color has-link-color wp-elements-e75e10d0fbb9d0f6ff525311431ce136\" style=\"color:#b00012\">\ud83d\udc49 <strong>Which number makes the equation true?<\/strong><\/p>\n\n\n\n<p> 64 \u2212 _____&nbsp;&nbsp;= 7 + 7<\/p>\n<\/div><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, add 7 + 7:<\/li>\n\n\n\n<li>64 \u2212 ? = 7 + 7<\/li>\n\n\n\n<li>64 \u2212 ? = 14<\/li>\n\n\n\n<li>Subtract 14 from both sides:<\/li>\n\n\n\n<li>64 \u2212 ? \u2212 14 = 14 \u2212 14<\/li>\n\n\n\n<li>50 \u2212 ? = 0<\/li>\n\n\n\n<li>Now, find the number that goes in the blank space. Remember, when a number is subtracted from itself, the difference is zero. The number in the blank space must be 50.<\/li>\n\n\n\n<li>The missing number is 50.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-background has-large-font-size\" style=\"background-color:#d8bef7\"><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-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color has-link-color wp-elements-19036dfd562dae4893e9add5ce2762da\" style=\"color:#b00012\">\ud83d\udc49<strong> Which number makes the equation true? <\/strong><\/p>\n\n\n\n<p>99 \u2212 87 =____&nbsp;&nbsp;+ 8<\/p>\n<\/div><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, subtract 99 \u2212 87:<\/li>\n\n\n\n<li>99 \u2212 87 = ? + 8<\/li>\n\n\n\n<li>12 = ? + 8<\/li>\n\n\n\n<li>Decide which number makes the addition number sentence true. You can think of an addition fact you know, or you can subtract to find the answer.<\/li>\n\n\n\n<li>The addition fact is: 4 + 8 = 12<\/li>\n\n\n\n<li>Did you remember this addition fact? If not, you can find the answer by subtracting.<\/li>\n\n\n\n<li>Subtract: 12 \u2212 8 = 4<\/li>\n\n\n\n<li>The missing number is 4.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\">Let&#8217;s practice!\ud83d\udd8a\ufe0f<\/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\/86342\/252\/673\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-291.png\" alt=\"\" class=\"wp-image-7740\" srcset=\"https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-291.png 500w, https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-291-300x300.png 300w, https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-291-150x150.png 150w, https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-3-291-400x400.png 400w\" 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\/86341\/690\/948\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-283.png\" alt=\"\" class=\"wp-image-7739\" srcset=\"https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-283.png 500w, https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-283-300x300.png 300w, https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-283-150x150.png 150w, https:\/\/2ndclass.deltapublications.in\/wp-content\/uploads\/2023\/04\/Worksheet-1-1-2-283-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Addition and subtraction &#8211; balance equations &#8211; up to 100 key notes : \u2b50 What is a Balance Equation? \ud83d\udc49 Example: \u2696\ufe0f Think of a Balance Scale \u2795\u2796 Using Addition and Subtraction \ud83d\udc49 Example: \ud83d\udd0d Find the Missing Number \ud83d\udc49 Examples: \ud83d\udd04 Check Both Sides \ud83d\udc49 Example: \u274c True or False \ud83d\udc49 Examples: \ud83e\udde0 Tips<a class=\"more-link\" href=\"https:\/\/2ndclass.deltapublications.in\/index.php\/s-9-addition-and-subtraction-balance-equations-up-to-100\/\">Continue reading <span class=\"screen-reader-text\">&#8220;S.9 Addition and subtraction &#8211; balance equations &#8211; up to 100&#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":{"footnotes":""},"class_list":["post-340","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=340"}],"version-history":[{"count":15,"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/340\/revisions"}],"predecessor-version":[{"id":22963,"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/340\/revisions\/22963"}],"wp:attachment":[{"href":"https:\/\/2ndclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}