[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-632957-105":59,"doc-detail-632957-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","add-and-subtract-within-20-sheet-3","Add and Subtract within 20 - Sheet 3","","This educational document provides a comprehensive math practice worksheet designed for 2nd-grade students, focusing on fundamental addition and subtraction skills within the range of 20. The resource features thirty specific arithmetic problems requiring students to calculate sums and differences, followed by a \"Challenge\" section that tests advanced logical thinking by asking students to identify two specific numbers based on provided total and difference values. The document also includes a complete answer key, serving as a valuable tool for self-assessment, classroom instruction, or homeschooling environments to reinforce mathematical fluency and numerical reasoning. Its clear, structured layout ensures that students can efficiently practice and master core calculation strategies essential for primary level mathematical development.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/add-and-subtract-within-20-sheet-3/632957/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/add-and-subtract-within-20-sheet-3/632957.png","ImageObject",300,407,{"name":92,"@type":93},"River Wang","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-22",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the objective of this worksheet?","Question",{"text":112,"@type":113},"The primary objective is to help 2nd-grade students practice and improve their addition and subtraction skills for numbers up to 20.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What kind of challenge is included in the document?",{"text":117,"@type":113},"The challenge section requires students to find two numbers that result in a specific total sum and a specific difference, which helps develop problem-solving and logical reasoning skills.",{"name":119,"@type":110,"acceptedAnswer":120},"Does this document contain solutions?",{"text":121,"@type":113},"Yes, the document includes a comprehensive answer key for all thirty arithmetic problems and the logic-based challenge questions.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},632957,1792942286,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24},1099514067438,"https://ap-avatar.wpscdn.com/avatar/100002539ee87300030?x-image-process=image/resize,m_fixed,w_180,h_180&k=1780474512215547542","ADD AND SUBTRACT WITHIN 20 SHEET 3  \n1) 12 – 9 =   16) 16 – 7 =   2) 4 + 12 =   17) 5 + 12 =   3) 15 – 11 =   18) 18 + 2 =   4) 20 – 6 =   19) 17 – 10 =   5) 9 + 8 =   20) 14 – 12 =   6) 13 + 2 =   21) 5 + 11 =   7) 17 – 5 =   22) 15 – 9 =   8) 3 + 12 =   23) 19 – 12 =   9) 13 – 9 =   24) 13 + 5 =   10) 6 + 8 =   25) 1 + 16 =   11) 19 – 2 =   26) 18 – 15 =   12) 11 – 8 =   27) 7 + 12 =   13) 12 + 7 =   28) 20 – 13 =   14) 18 – 6 =   29) 16 – 11 =    \n15) 8 + 10 =   30) 11 + 7 =    \nCHALLENGE – TOTAL AND DIFFERENCE  \n1) Find two numbers with a total of 11 and a difference of 1:   and    \n2) Find two numbers with a total of 12 and a difference of 6:   and    \n3) Find two numbers with a total of 13 and a difference of 3:   and    \nADD AND SUBTRACT WITHIN 20 SHEET 3 ANSWERS  \n1) 12 – 9 =  3  16) 16 – 7 =  9   \n2) 4 + 12 =  16  17) 5 + 12 =  17   \n3) 15 – 11 =  4  18) 18 + 2 =  20   \n4) 20 – 6 =  14  19) 17 – 10 =  7   \n5) 9 + 8 =  17  20) 14 – 12 =  2   \n6) 13 + 2 =  15  21) 5 + 11 =  16   \n7) 17 – 5 =  12  22) 15 – 9 =  6   \n8) 3 + 12 =  15  23) 19 – 12 =  7   \n9) 13 – 9 =  4  24) 13 + 5 =  18   \n10) 6 + 8 =  14  25) 1 + 16 =  17   \n11) 19 – 2 =  17  26) 18 – 15 =  3   \n12) 11 – 8 =  3  27) 7 + 12 =  19   \n13) 12 + 7 =  19  28) 20 – 13 =  7   \n14) 18 – 6 =  12  29) 16 – 11 =  5   \n15) 8 + 10 =  18  30) 11 + 7 =  18   \nCHALLENGE – TOTAL AND DIFFERENCE  \n\n| 1) | Find two numbers with a total of 11 and a difference of 1:  6 | and | 5 |\n| --- | --- | --- | --- |\n| 2) | Find two numbers with a total of 12 and a difference of 6:  9 | and | 3 |\n| 3) | Find two numbers with a total of 13 and a difference of 3:  8 | and | 5 |","cbCaic2ChffdYo59","https://ap.wps.com/l/cbCaic2ChffdYo59","pdf",187443,"English","# Addition and Subtraction Practice\n## Challenge - Total and Difference\n## Answer Key","[{\"question\":\"What is the objective of this worksheet?\",\"answer\":\"The primary objective is to help 2nd-grade students practice and improve their addition and subtraction skills for numbers up to 20.\"},{\"question\":\"What kind of challenge is included in the document?\",\"answer\":\"The challenge section requires students to find two numbers that result in a specific total sum and a specific difference, which helps develop problem-solving and logical reasoning skills.\"},{\"question\":\"Does this document contain solutions?\",\"answer\":\"Yes, the document includes a comprehensive answer key for all thirty arithmetic problems and the logic-based challenge questions.\"}]","Add and Subtract within 20 - Sheet 3 | PDF",1792671328]