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Part A rounds each addend to the nearest 10, Part B rounds each addend to the nearest 100, and Part C requires choosing the correct rounding place as directed for each sum. A bakery challenge problem adds two quantities and asks for estimates using both methods, identification of which is closer to the exact total, and a brief explanation. Includes an answer key.",{"@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/estimate-sums-rounding-to-the-nearest-10-and-100-worksheet-practice/360535/",{"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/estimate-sums-rounding-to-the-nearest-10-and-100-worksheet-practice/360535.png","ImageObject",300,407,{"name":92,"@type":93},"นรินทร์","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-24","2026-09-23",true,{"@type":102,"interactionType":103,"userInteractionCount":39},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does Part A ask you to do with each addend?","Question",{"text":112,"@type":113},"Round each addend to the nearest 10 first, then estimate the sum.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is Part B different from Part A?",{"text":117,"@type":113},"Part B rounds each addend to the nearest 100 before estimating the sum.",{"name":119,"@type":110,"acceptedAnswer":120},"In Part C, how do you decide whether to round to the nearest 10 or 100?",{"text":121,"@type":113},"Each problem directs you to a specific rounding place, so you round each addend to that place before estimating.","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},360535,1790796541,{"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":39,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"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":143,"read_time":39,"preview_page_count":4},2336475104957,"https://ap-avatar.wpscdn.com/avatar/22000c4c6bd8a5076e1?x-image-process=image/resize,m_fixed,w_180,h_180&k=1787554080175789136","Name:  \n_________________________________________  \nEstimate Sums (Rounding to the Nearest 10 and 100)Directions: Estimate each sum by rounding first.  \n• In Part A, round each addend to the nearest 10.  \n• In Part B, round each addend to the nearest 100.  \n• In Part C, choose whether to round to the nearest 10 or 100 (as directed) .  \n# Part A — Round to the nearest 10 (1–6)\n\n1. 53 + 26 ≈    \n2. 71 + 38 ≈    \n3. 146 + 57 ≈    \n4. 289 + 64 ≈    \n5. 95 + 82 ≈    \n6. 405 + 117 ≈    \n\n| Part B — Round to the nearest 100 (7–12)   |  |  |  |\n| --- | --- | --- | --- |\n| 7. 418 + 563 ≈     | 10.   | 5,208 + 3,491 ≈   | ________   |\n| 8. 790 + 241 ≈     | 11.   | 7,650 + 2,225 ≈   | ________   |\n| 9. 2,375 + 1,642 ≈     | 12.   | 8,999 + 4,760 ≈   | ________   |\n\n# Part C — Choose the rounding (13–16)\n\nDirections: Round each addend to the place shown, then estimate.  \n13. Round to the nearest 10: 672 + 349 ≈    \n14. Round to the nearest 100: 2,430 + 1,589 ≈    \n15. Round to the nearest 10: 508 + 236 ≈    \n16. Round to the nearest 100: 6,149 + 3,851 ≈    \n1  \nMashup Math LLC | All Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com  \nChallenge Problem (Show your thinking)  \n17. A bakery sold 462 muffins in the morning and 738 muffins in the afternoon.  \na) Estimate the total by rounding to the nearest 10:    \nb) Estimate the total by rounding to the nearest 100:    \nc) Which estimate (nearest 10 or nearest 100) will be closer to the exact  \ntotal?Circle one: 10 / 100  \nd) Explain in one sentence why:  \n2  \nMashup Math LLC | All Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com  \n# Answer Key\n\n## Part A — Nearest 10\n\n1. 80 (50 + 30)  \n2. 110 (70 + 40)  \n3. 200 (150 + 60)  \n4. 350 (290 + 60)  \n5. 180 (100 + 80)  \n6. 530 (410 + 120)  \n## Part B — Nearest 100\n\n7. 1,000 (400 + 600)  \n8. 1,000 (800 + 200)  \n9. 4,000 (2,400 + 1,600)  \n10. 8,700 (5,200 + 3,500)  \n11. 10,000 (7,700 + 2,300)  \n12. 13,800 (9,000 + 4,800)  \n## Part C\n\n13. 1,020 (670 + 350)  \n14. 4,000 (2,400 + 1,600)  \n15. 740 (510 + 230)  \n16. 10,000 (6,100 + 3,900)  \n# Challenge Problem\n\n17a) 1,200 (460 + 740)  \n17b) 1,200 (500 + 700)  \n17c) 10 and 100 are equally close (tie)  \n17d) Example sentence: The exact total is 1,200, so both rounding methods give thesame estimate.  \n3  \nMashup Math LLC | All Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com","cbCaiphePCURZVG1","https://ap.wps.com/l/cbCaiphePCURZVG1","pdf",1285626,"English","# Part A — Round to the nearest 10 (1–6)\n# Part B — Round to the nearest 100 (7–12)\n# Part C — Choose the rounding (13–16)\n# Challenge Problem","[{\"question\":\"What does Part A ask you to do with each addend?\",\"answer\":\"Round each addend to the nearest 10 first, then estimate the sum.\"},{\"question\":\"How is Part B different from Part A?\",\"answer\":\"Part B rounds each addend to the nearest 100 before estimating the sum.\"},{\"question\":\"In Part C, how do you decide whether to round to the nearest 10 or 100?\",\"answer\":\"Each problem directs you to a specific rounding place, so you round each addend to that place before estimating.\"}]","Estimate Sums - Rounding to the Nearest 10 and 100 - Worksheet Practice | PDF",1790140448]