[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-465550-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-465550-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":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","solving-mixed-problems-answer-key-465550","Solving Mixed Problems (+ -) - Answer Key","","Worksheets and an answer key for solving mixed addition and subtraction equations using a missing-value symbol. Each item follows the form “? + number = result”, “? − number = result”, or “left = right − ?/ + ?”, covering problems 1–20. The document includes multiple variants of the same skill set, labeled with answer keys, and supports Common Core style practice for arithmetic fluency.",{"@graph":14,"@context":73},[15,34,56],{"@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-answer-key-465550/465550/",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-answer-key-465550/465550.png","ImageObject",300,407,{"name":42,"@type":43},"Ivy","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-12","2026-09-30",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",8,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"How do you solve a problem like “? + 812 = 865”?","Question",{"text":63,"@type":64},"Subtract 812 from 865 to find the missing value.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How do you solve a problem like “? - 55 = 773”?",{"text":68,"@type":64},"Add 55 to 773 to get the missing value.",{"name":70,"@type":61,"acceptedAnswer":71},"What types of equation formats are included in these mixed problems?",{"text":72,"@type":64},"They include missing addends and missing subtractands in forms such as “? + a = b”, “? - a = b”, and “a = b + ?/ - ?” across problems 1–20.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},465550,1790819406,{"code":4,"msg":82,"data":83},"success",[84,88,92,95,100,105,110,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":93,"slug":94},70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":107,"show_sort_weight":108,"slug":109},7,"Healthcare",40,"healthcare",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},"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":96,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"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":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":112,"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":143,"read_time":144},549758252649,"https://ap-avatar.wpscdn.com/avatar/8000253669c5317157?_k=1778319167496531819","Solving Mixed Problems (+ -)  \nName:  \nFind the missing value in each of the problems.  \n1) ? + 812 = 865  \n2) 788 + ? = 878  \n3) ? -55 = 773  \n4) ? = 50 + 939  \n5) ? -606 = 386  \n6) 419 = 993- ?  \n7) 357 + ? = 392  \n8) 938 = ? + 197  \n9) 220 + ? = 876  \n1.  \n2.  \n3.  \n4.  \n5.  \n6.  \n7.  \n8.  \nAnswers  \n10) 885 = 433 + ?  \n11) 1000 = 977 + ?  \n12) ? -213 = 684  \n13) ? -142 = 619  \n14) ? -107 = 850  \n15) 711 = ? -234  \n16) ? = 876-309  \n17) ? = 172 + 691  \n18) 90 = 508- ?  \n19) 938 = ? + 47  \n20) ? = 603 + 359  \n9.  \n10.  \n11.  \n12.  \n13.  \n14.  \n15.  \n16.  \n17.  \n18.  \n19.  \n20.  \nMath  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n1  \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) ? + 812 = 865 | Answers\u003Cbr>1. 53 |\n| --- | --- |\n| 2) 788 + ? = 878 | 2. 90 |\n| 3) ? -55 = 773 | 3. 828 |\n| 4) ? = 50 + 939 | 4. 989 |\n| 5) ? -606 = 386 | 5.  992  |\n| 6) 419 = 993- ? | 6. 574 |\n| 7) 357 + ? = 392 | 7. 35 |\n| 8) 938 = ? + 197 | 8. 741 |\n| 9) 220 + ? = 876 | 9. 656 |\n| 10) 885 = 433 + ? | 10. 452 |\n| 11) 1000 = 977 + ? | 11. 23 |\n| 12) ? -213 = 684 | 12. 897 |\n| 13) ? -142 = 619 |  |\n| 14) ? -107 = 850 | 13.  761  |\n| 15) 711 = ? -234 | 14.  957  |\n| 16) ? = 876-309 | 15.  945  |\n| 17) ? = 172 + 691 | 16.  567  |\n| 18) 90 = 508- ? | 17.  863  |\n| 19) 938 = ? + 47 | 18.  418  |\n| 20) ? = 603 + 359 | 19.  891  20. 962 |\n\nMath  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n1  \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.  \n992  \n35  \n53  \n1) ? + 812 = 865  \n2) 788 + ? = 878  \n3) ? -55 = 773  \n4) ? = 50 + 939  \n5) ? -606 = 386  \n6) 419 = 993- ?  \n7) 357 + ? = 392  \n8) 938 = ? + 197  \n9) 220 + ? = 876  \n10) 885 = 433 + ?  \n11) 1000 = 977 + ?  \n12) ? -213 = 684  \n452  \n656  \n90  \n989  \n897  \n741  \n23  \n828  \n574  \nAnswers  \n1.  \n2.  \n3.  \n4.  \n5.  \n6.  \n7.  \n8.  \n9.  \n10.  \n11.  \n12.  \nMath  \nModified  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n1  \n1-10 92  \n11-12 8  \n83  \n0  \n75 67 58 50 42 33 25 17  \nSolving Mixed Problems (+ -)  \nName:  \nFind the missing value in each of the problems.  \n1) ? + 623 = 812  \n2) 138 = 525- ?  \n3) 935- ? = 901  \n4) ? -270 = 623  \n5) ? = 609-369  \n6) 753-255 = ?  \n7) ? = 730 + 28  \n8) 908-649 = ?  \n9) 924 + ? = 951  \n1.  \n2.  \n3.  \n4.  \n5.  \n6.  \n7.  \n8.  \nAnswers  \n10) 813 = ? -145  \n11) 986 = 943 + ?  \n12) 974-315 = ?  \n13) 389 + ? = 869  \n14) ? -145 = 1  \n15) 855 = ? + 616  \n16) 444 + 429 = ?  \n17) ? = 997 + 1  \n18) ? = 516-114  \n19) ? = 740-353  \n20) 726-723 = ?  \n9.  \n10.  \n11.  \n12.  \n13.  \n14.  \n15.  \n16.  \n17.  \n18.  \n19.  \n20.  \nMath  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n2  \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) ? + 623 = 812 | Answers\u003Cbr>1. 189 |\n| --- | --- |\n| 2) 138 = 525- ? | 2. 387 |\n| 3) 935- ? = 901 | 3. 34 |\n| 4) ? -270 = 623 | 4. 893 |\n| 5) ? = 609-369 | 5.  240  |\n| 6) 753-255 = ? | 6. 498 |\n| 7) ? = 730 + 28 | 7. 758 |\n| 8) 908-649 = ? | 8. 259 |\n| 9) 924 + ? = 951 | 9. 27 |\n| 10) 813 = ? -145 | 10. 958 |\n| 11) 986 = 943 + ? | 11. 43 |\n| 12) 974-315 = ? | 12. 659 |\n| 13) 389 + ? = 869 |  |\n| 14) ? -145 = 1 | 13.  480  |\n| 15) 855 = ? + 616 | 14.  146  |\n| 16) 444 + 429 = ? | 15.  239  |\n| 17) ? = 997 + 1 | 16.  873  |\n| 18) ? = 516-114 | 17.  998  |\n| 19) ? = 740-353 | 18.  402  |\n| 20) 726-723 = ? | 19.  387  20. 3 |\n\nMath  \n[www.CommonCoreSheets.com](www.CommonCoreSheets.com)  \n2  \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 mis","cbCaivvWdSUNZqbf","https://ap.wps.com/l/cbCaivvWdSUNZqbf","pdf",448153,"English","# Find the missing value in each of the problems\n## Problems 1-20\n## Answers","[{\"question\":\"How do you solve a problem like “? + 812 = 865”?\",\"answer\":\"Subtract 812 from 865 to find the missing value.\"},{\"question\":\"How do you solve a problem like “? - 55 = 773”?\",\"answer\":\"Add 55 to 773 to get the missing value.\"},{\"question\":\"What types of equation formats are included in these mixed problems?\",\"answer\":\"They include missing addends and missing subtractands in forms such as “? + a = b”, “? - a = b”, and “a = b + ?/ - ?” across problems 1–20.\"}]","Solving Mixed Problems (+ -) - Answer Key | PDF",1790769757,76]