[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-545939-105":59,"doc-detail-545939-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","grade-4-math-adding-three-numbers-mental-math-worksheet","Grade 4 Math - Adding Three Numbers - Mental Math Worksheet","","This Grade 4 mathematics worksheet is designed to enhance students' mental arithmetic skills through the addition of three 1 and 2-digit numbers. The document provides a structured set of twenty practice problems, requiring students to calculate the sum for each series of numbers. It serves as an effective learning assessment tool for teachers and parents seeking to reinforce addition fluency in elementary school students. The resource includes a full answer key to assist with self-evaluation and grading progress.",{"@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/grade-4-math-adding-three-numbers-mental-math-worksheet/545939/",{"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/grade-4-math-adding-three-numbers-mental-math-worksheet/545939.png","ImageObject",300,407,{"name":92,"@type":93},"Ezra","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-10","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the target grade level for this worksheet?","Question",{"text":112,"@type":113},"This worksheet is specifically designed for Grade 4 students.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What mathematical operation does this document focus on?",{"text":117,"@type":113},"The document focuses on the addition of three 1 and 2-digit numbers, specifically targeting mental math proficiency.",{"name":119,"@type":110,"acceptedAnswer":120},"How many practice problems are included in the worksheet?",{"text":121,"@type":113},"The worksheet contains a total of 20 practice problems to help students practice their addition skills.","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},545939,1791775786,{"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":24,"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},1099514068035,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Mental math: adding three 1 and 2-digit numbers  \nGrade 4 Addition Worksheet  \nFind the sum.  \n1. 66 + 49 + 45 =   2. 7 + 2 + 90 =   3. 88 + 55 + 66 =   4. 24 + 7 + 7 =   5. 1 + 38 + 69 =   6. 26 + 4 + 1 =   7. 3 + 30 + 2 =   8. 3 + 45 + 21 =   9. 33 + 15 + 75 =   10. 25 + 2 + 7 =   11. 7 + 41 + 6 =   12. 44 + 55 + 4 =   13. 77 + 3 + 2 =   14. 93 + 8 + 6 =   15. 91 + 4 + 89 =   16. 11 + 1 + 40 =   17. 8 + 4 + 56 =   18. 4 + 63 + 2 =    \n19. 44 + 15 + 2 =   20. 61 + 3 + 31 =    \nOnline reading & math for K-5 © [www.k5learning.com](www.k5learning.com)  \nMental math: adding three 1 and 2-digit numbers  \nGrade 4 Addition Worksheet  \nFind the sum.  \n1. 66 + 49 + 45 =  160  2. 7 + 2 + 90 =  99   \n3. 88 + 55 + 66 =  209  4. 24 + 7 + 7 =  38   \n5. 1 + 38 + 69 =  108  6. 26 + 4 + 1 =  31   \n7. 3 + 30 + 2 =  35  8. 3 + 45 + 21 =  69   \n9. 33 + 15 + 75 =  123  10. 25 + 2 + 7 =  34   \n11. 7 + 41 + 6 =  54  12. 44 + 55 + 4 =  103   \n13. 77 + 3 + 2 =  82  14. 93 + 8 + 6 =  107   \n15. 91 + 4 + 89 =  184  16. 11 + 1 + 40 =  52   \n17. 8 + 4 + 56 =  68  18. 4 + 63 + 2 =  69   \n19. 44 + 15 + 2 =  61  20. 61 + 3 + 31 =  95","cbCailxBWK0252i7","https://ap.wps.com/l/cbCailxBWK0252i7","pdf",13682,"English","# Mental Math Practice Problems\n## Answer Key","[{\"question\":\"What is the target grade level for this worksheet?\",\"answer\":\"This worksheet is specifically designed for Grade 4 students.\"},{\"question\":\"What mathematical operation does this document focus on?\",\"answer\":\"The document focuses on the addition of three 1 and 2-digit numbers, specifically targeting mental math proficiency.\"},{\"question\":\"How many practice problems are included in the worksheet?\",\"answer\":\"The worksheet contains a total of 20 practice problems to help students practice their addition skills.\"}]","Grade 4 Math - Adding Three Numbers - Mental Math Worksheet | PDF"]