[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-465563-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-465563-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","solving-mixed-problems-practice-missing-values","Solving Mixed Problems (+ -) - Practice Missing Values","","Find the missing value in a set of mixed addition and subtraction equations. The problems include formats such as a number equals a larger number minus an unknown, sums where an addend is missing, and expressions where the unknown is on the left side. An answer key provides the computed missing values for questions 1 through 20, supporting quick checking of solutions.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/solving-mixed-problems-practice-missing-values/465563/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/solving-mixed-problems-practice-missing-values/465563.png","ImageObject",300,407,{"name":42,"@type":43},"Ivy","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-30","2026-09-30",true,{"@type":52,"interactionType":53,"userInteractionCount":33},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"How do I solve equations with an unknown in a subtraction problem?","Question",{"text":62,"@type":63},"Use inverse operations: if the equation is A = B - ?, add the missing value to both sides (or subtract B from both sides) to isolate the unknown.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"What should I do when the unknown is part of an addition equation?",{"text":67,"@type":63},"Use inverse operations again: if ? + C = D, subtract C from D to get the missing value.",{"name":69,"@type":60,"acceptedAnswer":70},"Where can I verify the answers for problems 1 through 20?",{"text":71,"@type":63},"Use the provided answer key, which lists the missing values corresponding to each numbered problem.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},465563,1790769767,{"code":4,"msg":81,"data":82},"success",[83,87,91,94,99,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":92,"slug":93},70,"exam",{"id":95,"doc_module":4,"doc_module_name":25,"category_name":96,"show_sort_weight":97,"slug":98},5,"Comic",60,"comic",{"id":100,"doc_module":4,"doc_module_name":25,"category_name":101,"show_sort_weight":102,"slug":103},6,"Technology",50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":95,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":33,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":30,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":79,"read_time":110},549758252649,"https://ap-avatar.wpscdn.com/avatar/8000253669c5317157?_k=1778319167496531819","Solving Mixed Problems (+ -)  \nName:  \nFind the missing value in each of the problems.  \n1) 582 = 917- ?  \n2) 330 + ? = 775  \n3) 671-313 = ?  \n4) 764-167 = ?  \n5) 680 = 615 + ?  \n6) 245 + 499 = ?  \n7) ? -26 = 954  \n8) ? = 960-12  \n9) 776 = ? -24  \n1.  \n2.  \n3.  \n4.  \n5.  \n6.  \n7.  \n8.  \nAnswers  \n10) ? = 791-314  \n11) ? = 102 + 272  \n12) 666- ? = 363  \n13) 526 + ? = 690  \n14) 895-39 = ?  \n15) 797 = 334 + ?  \n16) 259 + 511 = ?  \n17) 712 + ? = 901  \n18) 796 + ? = 854  \n19) 950 + ? = 962  \n20) ? -672 = 87  \n9.  \n10.  \n11.  \n12.  \n13.  \n14.  \n15.  \n16.  \n17.  \n18.  \n19.  \n20.  \nMath  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n6  \n1-10 11-20  \n95  \n45  \n90  \n40  \n85  \n35  \n80  \n30  \n75  \n25  \n70  \n20  \n65  \n15  \n60  \n10  \n55  \n5  \n50  \n0  \nSolving Mixed Problems (+ -)  \nName: Answer Key  \n\n| Find the missing value in each of the problems.\u003Cbr>1) 582 = 917- ? |  | Answers\u003Cbr>1. 335 |\n| --- | --- | --- |\n| 2) 330 + ? = 775 |  | 2. 445 |\n| 3) | 671-313 = ? | 3. 358 |\n| 4) | 764-167 = ? | 4. 597 |\n| 5) | 680 = 615 + ? | 5.  65  |\n| 6) | 245 + 499 = ? | 6. 744 |\n| 7) | ? -26 = 954 | 7. 980 |\n| 8) | ? = 960-12 | 8. 948 |\n| 9) | 776 = ? -24 | 9. 800 |\n| 10) | ? = 791-314 | 10. 477 |\n| 11) | ? = 102 + 272 | 11. 374 |\n| 12) | 666- ? = 363 | 12. 303 |\n| 13) | 526 + ? = 690 |  |\n| 14) | 895-39 = ? | 13.  164  |\n| 15) | 797 = 334 + ? | 14.  856  |\n| 16) | 259 + 511 = ? | 15.  463  |\n| 17) | 712 + ? = 901 | 16.  770  |\n| 18) | 796 + ? = 854 | 17.  189  |\n| 19) | 950 + ? = 962 | 18.  58  |\n| 20) | ? -672 = 87 | 19.  12  20. 759 |\n\nMath  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n6  \n1-10 11-20  \n95  \n45  \n90  \n40  \n85  \n35  \n80  \n30  \n75  \n25  \n70  \n20  \n65  \n15  \n60  \n10  \n55  \n5  \n50  \n0  \nSolving Mixed Problems (+ -)  \nName:  \nFind the missing value in each of the problems.  \n597  \n948  \n335  \n1) 582 = 917- ?  \n2) 330 + ? = 775  \n3) 671-313 = ?  \n4) 764-167 = ?  \n5) 680 = 615 + ?  \n6) 245 + 499 = ?  \n7) ? -26 = 954  \n8) ? = 960-12  \n9) 776 = ? -24  \n10) ? = 791-314  \n11) ? = 102 + 272  \n12) 666- ? = 363  \n980  \n374  \n477  \n445  \n800  \n65  \n744  \n358  \n303  \nAnswers  \n1.  \n2.  \n3.  \n4.  \n5.  \n6.  \n7.  \n8.  \n9.  \n10.  \n11.  \n12.  \nMath  \nModified  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n6  \n1-10 92  \n11-12 8  \n83  \n0  \n75 67 58 50 42 33 25 17","cbCaip7JjUl2rDBA","https://ap.wps.com/l/cbCaip7JjUl2rDBA","pdf",44041,"English","# Find the missing value\n## Problems 1-12\n## Problems 13-20\n## Answers","[{\"question\":\"How do I solve equations with an unknown in a subtraction problem?\",\"answer\":\"Use inverse operations: if the equation is A = B - ?, add the missing value to both sides (or subtract B from both sides) to isolate the unknown.\"},{\"question\":\"What should I do when the unknown is part of an addition equation?\",\"answer\":\"Use inverse operations again: if ? + C = D, subtract C from D to get the missing value.\"},{\"question\":\"Where can I verify the answers for problems 1 through 20?\",\"answer\":\"Use the provided answer key, which lists the missing values corresponding to each numbered problem.\"}]","Solving Mixed Problems (+ -) - Practice Missing Values | PDF"]