[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-361062-105":59,"doc-detail-361062-en":131},{"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":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","practice-adding-3-digit-numbers-b-core-practice","Practice Adding 3-Digit Numbers - B - Core Practice","","Worksheet practice focused on adding 3-digit numbers, organized into warm-up problems, core practice sets, and an error-analysis section. Students follow directions to show neat work without calculators and calculate sums from given addends. The error analysis tasks require students to judge whether provided final answers are correct, determine the correct sums, and explain the mistake in one sentence. A challenge problem adds ticket totals, estimates by rounding to the nearest hundred, and justifies the reasonableness of the estimate.",{"@graph":69,"@context":123},[70,84,106],{"@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/practice-adding-3-digit-numbers-b-core-practice/361062/",{"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/practice-adding-3-digit-numbers-b-core-practice/361062.png","ImageObject",300,407,{"name":92,"@type":93},"Terk","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-27","2026-09-23",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",14,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"Do the directions allow using calculators?","Question",{"text":113,"@type":114},"No. The worksheet specifies no calculators and instructs students to show neat work.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What do students do in Part C—Error Analysis?",{"text":118,"@type":114},"For each problem, students decide whether the final answer is correct, write the correct sum, and explain the mistake in one sentence.",{"name":120,"@type":111,"acceptedAnswer":121},"How is the challenge problem (16) handled?",{"text":122,"@type":114},"Students estimate the total by rounding to the nearest hundred, compute the exact total, and explain why the estimate is reasonable.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},361062,1790240706,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":52,"preview_page_count":4},1099525198933,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Name:    \nPractice Adding 3-Digit Numbers Directions: Add. Show neat work. (No calculators. )  \nPART A—Warm-Up  \n1. 235 + 122 =   3. 511 + 249 =    \n2. 408 + 391 =   4. 760 + 185 =    \nPART B—Core Practice  \n5. 6. 7.  \n279 + 158  \n518 + 367  \n643 + 299  \n8. 9. 10.  \n1  \nMashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at ](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)[www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)  \nPART C—Error Analysis (13–14)  \nDirections: Each problem below has a mistake. Write the correct sum.  \n14. Marty solved an addition problem as follows:  \n513  \n + 197  \n700  \nIs the final answer correct? YES NO  \nIf the final answer is incorrect, what is the correct sum?    \nExplain, in one sentence, where the mistake was made:  \n15. Kenji solved an addition problem as follows:  \n808 + 287  \n1,195  \nIs the final answer correct? YES NO  \nIf the final answer is incorrect, what is the correct sum?   Explain, in one sentence, where the mistake was made:  \n2  \nMashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at ](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)[www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)  \nCHALLENGE PROBLEM (Show your thinking)  \n16. A zoo sold 478 tickets on Saturday and 543 tickets on Sunday.  \na) Estimate the total by rounding each number to the nearest hundred:    \nb) Find the exact total:    \nc) Explain in one sentence why your estimate is reasonable:  \nMashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at ](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)[www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)  \n3  \nAnswer Key  \nPart A—Warm-Up  \n1. 235 + 122 = 357  \n2. 408 + 391 = 799  \n3. 511 + 249 = 760  \n4. 760 + 185 = 945  \nPart B—Core Practice  \n5. 279 + 158 = 437  \n6. 518 + 367 = 885  \n7. 643 + 299 = 942  \n8. 509 + 575 = 1,084  \n9. 761 + 489 = 1,250  \n10. 630 + 529 = 1,159  \n11.957 + 282 = 1,239  \n12.746 + 759 = 1,505  \n13. 979 + 424 = 1,403 Part C—Error Analysis  \n14. NO  \nCorrect sum: 710  \nMistake (one sentence): They did not regroup correctly (13 + 7 = 20 ones, so you must carry 2 tens) .  \n15.YES  \nCorrect sum: 1,095  \nExplanation (one sentence): The correct sum is 1,095, so 1,195 is too high (they likely carried an extra hundred) .  \nChallenge Problem  \n16a) Estimate (nearest hundred): 478 ≈ 500 and 543 ≈ 500 → 1,000  \n16b) Exact total: 478 + 543 = 1,021  \n16c) Example sentence: 1,000 is reasonable because rounding both numbers to the nearest hundred gives a close estimate to 1,021 .  \n4  \nMashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at ](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)[www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)","cbCaiouKWlTF9Mjc","https://ap.wps.com/l/cbCaiouKWlTF9Mjc","pdf",1406621,"English","# Part A—Warm-Up\n# Part B—Core Practice\n# Part C—Error Analysis (13–14)\n# Challenge Problem","[{\"question\":\"Do the directions allow using calculators?\",\"answer\":\"No. The worksheet specifies no calculators and instructs students to show neat work.\"},{\"question\":\"What do students do in Part C—Error Analysis?\",\"answer\":\"For each problem, students decide whether the final answer is correct, write the correct sum, and explain the mistake in one sentence.\"},{\"question\":\"How is the challenge problem (16) handled?\",\"answer\":\"Students estimate the total by rounding to the nearest hundred, compute the exact total, and explain why the estimate is reasonable.\"}]","Practice Adding 3-Digit Numbers - B - Core Practice | PDF",1790142979]