[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-477851-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-477851-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","determining-reasonable-answer-answer-key","Determining Reasonable Answer - Answer Key","","Sets out rules for judging whether multiplication results are reasonable, using end-digit patterns. Explains that answers from multiplying by 2 must end even, multiplying by 5 must end in 5 or 0, and multiplying by 10 must end in 0. Provides multiple example problems of mixed factors (including 2, 5, and 10) and supplies an answer key labeling each item as yes or no for reasonableness.",{"@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/determining-reasonable-answer-answer-key/477851/",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/determining-reasonable-answer-answer-key/477851.png","ImageObject",300,407,{"name":42,"@type":43},"supergirl","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-31","2026-09-30",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",10,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What end-digit rule applies when multiplying by 2?","Question",{"text":63,"@type":64},"The result must end in an even number (0, 2, 4, 6, or 8).","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What end-digit rule applies when multiplying by 5?",{"text":68,"@type":64},"The result must end in either 5 or 0.",{"name":70,"@type":61,"acceptedAnswer":71},"What end-digit rule applies when multiplying by 10?",{"text":72,"@type":64},"The result must end in 0.","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},477851,1790818887,{"code":4,"msg":82,"data":83},"success",[84,88,92,95,100,105,110,115,120,123,126],{"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":111,"doc_module":4,"doc_module_name":25,"category_name":112,"show_sort_weight":113,"slug":114},8,"Research & Report",30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":55,"slug":125},"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":113,"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},962088121634,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Determining  \nReasonable Answer  \nName:  \nDetermine if the answer shown is reasonable (yes) or not (no).  \nA2,n4,yt6,h8n0g) times 2 HAS to end in an even number Ex. 2 × 6 = 12 2 × 13 = 26 • Anything times 5 HAS to end in an either a 5 or a 0. Ex. 5 × 4 = 20 5 × 15 = 75  \n• Anything times 10 HAS to end in a 0. Ex. 10 × 7 = 70 10 × 16 = 160  \n1) 10 × 485 = 4,852 2) 401 × 5 = 2,007  \n3) 665 × 2 = 1,330 4) 5 × 257 = 1,285  \n5) 242 × 2 = 484 6) 10 × 338 = 3,380  \n7) 690 × 5 = 3,453 8) 10 × 309 = 3,090  \n9) 211 × 2 = 422 10) 226 × 2 = 453  \n11) 329 × 10 = 3,290 12) 10 × 306 = 3,060  \n13) 2 × 646 = 1,293 14) 5 × 886 = 4,430  \n15) 5 × 882 = 4,412 16) 540 × 10 = 5,409  \n17) 2 × 577 = 1,155 18) 648 × 2 = 1,296  \n19) 738 × 5 = 3,691 20) 243 × 10 = 2,432  \nAnswers  \n1.  \n2.  \n3.  \n4.  \n5.  \n6.  \n7.  \n8.  \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  \nDetermining  \nReasonable Answer  \nName: Answer Key  \nDetermine if the answer shown is reasonable (yes) or not (no).  \nA2,n4,yt6,h8n0g) times 2 HAS to end in an even number Ex. 2 × 6 = 12 2 × 13 = 26 • Anything times 5 HAS to end in an either a 5 or a 0. Ex. 5 × 4 = 20 5 × 15 = 75  \n• Anything times 10 HAS to end in a 0. Ex. 10 × 7 = 70 10 × 16 = 160  \n1) 10 × 485 = 4,852 2) 401 × 5 = 2,007  \n3) 665 × 2 = 1,330 4) 5 × 257 = 1,285  \n5) 242 × 2 = 484 6) 10 × 338 = 3,380  \n7) 690 × 5 = 3,453 8) 10 × 309 = 3,090  \n9) 211 × 2 = 422 10) 226 × 2 = 453  \n11) 329 × 10 = 3,290 12) 10 × 306 = 3,060  \n13) 2 × 646 = 1,293 14) 5 × 886 = 4,430  \n15) 5 × 882 = 4,412 16) 540 × 10 = 5,409  \n17) 2 × 577 = 1,155 18) 648 × 2 = 1,296  \n19) 738 × 5 = 3,691 20) 243 × 10 = 2,432  \nAnswers  \n[1.](1. no)[ no](1. no)  \n[2.](2. no)[ no](2. no)  \n3. yes  \n4. yes  \n5. yes  \n6. yes  \n[7.](7. no)[ no](7. no)  \n8. yes  \n9. yes  \n[10.](10. no)[ no](10. no)  \n11. yes  \n12. yes  \n[13.](13. no)[ no](13. no)  \n14. yes  \n[15.](15. no)[ no](15. no)  \n[16.](16. no)[ no](16. no)  \n[17.](17. no)[ no](17. no)  \n18. yes  \n[19.](19. no)[ no](19. no)  \n[20.](20. no)[ no](20. no)  \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  \nDetermining  \nReasonable Answer  \nName:  \nDetermine if the answer shown is reasonable (yes) or not (no).  \nA2,n4,yt6,h8n0g) times 2 HAS to end in an even number Ex. 2 × 6 = 12 2 × 13 = 26 • Anything times 5 HAS to end in an either a 5 or a 0. Ex. 5 × 4 = 20 5 × 15 = 75  \n• Anything times 10 HAS to end in a 0. Ex. 10 × 7 = 70 10 × 16 = 160  \nyes no yes yes  \nyes no yes yes  \nyes yes no no  \n1) 10 × 485 = 4,852 2) 401 × 5 = 2,007  \n3) 665 × 2 = 1,330 4) 5 × 257 = 1,285  \n5) 242 × 2 = 484 6) 10 × 338 = 3,380  \nAnswers  \n1.  \n2.  \n3.  \n4.  \n5.  \n6.  \n7.  \n8.  \n9.  \n10.  \n11.  \n12.  \n7) 690 × 5 = 3,453 8) 10 × 309 = 3,090  \n9) 211 × 2 = 422 10) 226 × 2 = 453  \n11) 329 × 10 = 3,290 12) 10 × 306 = 3,060  \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  \nDetermining  \nReasonable Answer  \nName:  \nDetermine if the answer shown is reasonable (yes) or not (no).  \nA2,n4,yt6,h8n0g) times 2 HAS to end in an even number Ex. 2 × 6 = 12 2 × 13 = 26 • Anything times 5 HAS to end in an either a 5 or a 0. Ex. 5 × 4 = 20 5 × 15 = 75  \n• Anything times 10 HAS to end in a 0. Ex. 10 × 7 = 70 10 × 16 = 160  \n1) 189 × 2 = 379 2) 10 × 633 = 6,330  \n3) 5 × 856 = 4,280 4) 254 × 5 = 1,270  \n5) 5 × 186 = 930 6) 390 × 10 = 3,903  \n7) 325 × 2 = 650 8) 5 × 493 = 2,469  \n9) 348 × 5 = 1,743 10) 2 × 894 = 1,788  \n11) 10 × 961 = 9,610 12) 317 × 10 = 3,176  \n13) 5 × 524 = 2,621 14) 757 × 2 = 1,515  \n15) 347 × 10 = 3,471 16) 10 × 813 = 8,130  \n17) 10 × 439 = 4,390 18) 690 × 2 = 1,381  \n19) 10 × 486 = 4,866 20) 5 × 858 = 4,290  \nAnswers  \n1.  \n2.  \n3. ","cbCaiu3zutEQE7tN","https://ap.wps.com/l/cbCaiu3zutEQE7tN","pdf",490159,"English","# Determine if the answer is reasonable\n## Rules for multiplying by 2, 5, and 10\n## Example problems and yes/no judgments","[{\"question\":\"What end-digit rule applies when multiplying by 2?\",\"answer\":\"The result must end in an even number (0, 2, 4, 6, or 8).\"},{\"question\":\"What end-digit rule applies when multiplying by 5?\",\"answer\":\"The result must end in either 5 or 0.\"},{\"question\":\"What end-digit rule applies when multiplying by 10?\",\"answer\":\"The result must end in 0.\"}]","Determining Reasonable Answer - Answer Key | PDF",1790790502,76]