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The document provides a structured list of 20 practice equations involving two-digit numbers, designed to reinforce addition fluency and algebraic thinking. The worksheet includes two versions of the same set of problems: an initial blank exercise sheet and a complete answer key with the solutions filled in. This resource is suitable for classroom assessment, independent practice, or remedial learning, providing a clear and straightforward format for fifth-grade students to practice their arithmetic capabilities and master the concept of identifying unknown values in addition expressions.",{"@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/mental-math-missing-addends-grade-5-addition-worksheet/544573/",{"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/mental-math-missing-addends-grade-5-addition-worksheet/544573.png","ImageObject",300,407,{"name":92,"@type":93},"Lucas Martin","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-03","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"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 objective is to practice mental math by identifying missing addends in two-digit addition problems.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Who is this worksheet designed for?",{"text":117,"@type":113},"This worksheet is designed for Grade 5 students.",{"name":119,"@type":110,"acceptedAnswer":120},"Does the document provide solutions?",{"text":121,"@type":113},"Yes, the document includes both the practice problems and a completed answer key for all 20 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},544573,1791772728,{"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":34,"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":129,"read_time":24,"preview_page_count":4},8796095360427,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Mental math: missing addends  Grade 5 Addition Worksheet  \nFind the missing number.  \n1) 45 + 43 =   2)   + 49 = 90  \n3) 40 + 44 =   4) 48 + 17 =    \n5) 38 + 24 =   6) 49 +   = 98  \n7) 24 +   = 73 8)   + 42 = 60  \n9)   + 19 = 66 10) 42 +   = 92  \n11) 34 + 33 =   12)   + 11 = 52  \n13)   + 30 = 61 14) 16 +   = 55  \n15) 23 +   = 36 16)   + 23 = 45  \n17) 17 + 12 =   18) 17 +   = 43  \n19)   + 20 = 38 20)   + 40 = 64  \nMental math: missing addends  Grade 5 Addition Worksheet  \nFind the missing number.  \n1) 45 + 43 =  88  2)  41  + 49 = 90  \n3) 40 + 44 =  84  4) 48 + 17 =  65   \n5) 38 + 24 =  62  6) 49 +  49  = 98  \n7) 24 +  49  = 73 8)  18  + 42 = 60  \n9)  47  + 19 = 66 10) 42 +  50  = 92  \n11) 34 + 33 =  67  12)  41  + 11 = 52  \n13)  31  + 30 = 61 14) 16 +  39  = 55  \n15) 23 +  13  = 36 16)  22  + 23 = 45  \n17) 17 + 12 =  29  18) 17 +  26  = 43  \n19)  18  + 20 = 38 20)  24  + 40 = 64","cbCaiqOFOaQSVZIf","https://ap.wps.com/l/cbCaiqOFOaQSVZIf","pdf",61796,"English","# Mental Math Missing Addends - Practice Exercises\n## Answer Key","[{\"question\":\"What is the objective of this worksheet?\",\"answer\":\"The objective is to practice mental math by identifying missing addends in two-digit addition problems.\"},{\"question\":\"Who is this worksheet designed for?\",\"answer\":\"This worksheet is designed for Grade 5 students.\"},{\"question\":\"Does the document provide solutions?\",\"answer\":\"Yes, the document includes both the practice problems and a completed answer key for all 20 questions.\"}]","Mental Math - Missing Addends - Grade 5 Addition Worksheet | PDF"]