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Problems cover poster boards, balloons, project displays, safety goggles, ticket sales, science notebooks, judging ribbons, visitors in the gym, and battery packs, plus a multi-step challenge on total posters in the hallway. An answer key provides the computed equations and results.",{"@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/mixed-addition-subtraction-word-problems-mixed-addition-subtraction-solve-the-science-fair-questions/360798/",{"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/mixed-addition-subtraction-word-problems-mixed-addition-subtraction-solve-the-science-fair-questions/360798.png","ImageObject",300,407,{"name":92,"@type":93},"Putri","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-07","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},"What should students do for each mixed addition and subtraction word problem?","Question",{"text":113,"@type":114},"Read the story problem, decide if addition or subtraction is needed, write an equation, and solve it. Show work when extra space is needed.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"Are these problems about a specific school event?",{"text":118,"@type":114},"Yes. All scenarios are connected to the school science fair, including items like posters, tickets, notebooks, ribbons, and visitors.",{"name":120,"@type":111,"acceptedAnswer":121},"Is there an answer key included?",{"text":122,"@type":114},"Yes. The document includes an answer key listing the equations and final answers for problems 1 through 10.","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},360798,1790217177,{"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},962085571259,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Name:  \n_________________________________________  \nMixed Addition & Subtraction Word Problems Directions: Read each word problem about the school science fair.  \nDecide if you need to add or subtract. Write an equation and solve. Show your work if you need extra space.  \n1. Poster Boards  \nThe 3rd graders make 28 poster boards for the science fair.  \nThe 4th graders make 16 poster boards.  \nHow many poster boards do they make in all?  \n• Equation:   Answer:   poster boards  \n2. Broken Balloons  \nThere are 45 balloons decorating the gym.  \nDuring setup, 17 balloons pop.  \nHow many balloons are left?  \n• Equation:   Answer:   balloons  \n3. Project Tables  \nThere are 32 project displays set up in the morning.  \nIn the afternoon, students add 19 more displays.  \nHow many project displays are there in all?  \n• Equation:   Answer:   displays  \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)  \n4. Safety Goggles  \nThe supply table has 50 pairs of safety goggles. Students borrow 23 pairs for their experiments.  \nHow many pairs of safety goggles are still on the table?  \n• Equation:   Answer:   pairs  \n5. Ticket Sales  \nOn Monday, the school sells 37 tickets to the science fair. On Tuesday, they sell 28 more tickets.  \nHow many tickets are sold on Monday and Tuesday altogether?  \n• Equation:   Answer:   tickets  \n6. Science Notebooks  \nAt the start of the day, there are 64 science notebooks in a box. Students take 29 notebooks for their projects.  \nHow many notebooks remain in the box?  \n• Equation:   Answer:   notebooks  \n7. Judging Ribbons  \nThe teachers have 40 ribbons for prize winners. They give out 18 ribbons in the morning and 9 more in the afternoon.  \nHow many ribbons are left?  \n• Equation:   Answer:   ribbons  \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)  \n8. Visitors in the Gym  \nIn the first hour, 56 visitors come to the science fair.  \nIn the second hour, 34 more visitors arrive.  \nThen 27 visitors leave.  \nHow many visitors are in the gym now?  \n• Equation:   Answer:   visitors  \n9. Battery Packs  \nThe supply cart starts with 48 battery packs. Students use 15 battery packs for their projects and then return 6 unused packs at the end. How many battery packs are on the cart now?  \n• Equation:   Answer:   battery packs  \n10. Challenge Problem – Total Posters in the Hallway  \nStudents hang posters in the hallway to advertise the science fair.  \n• The first grade hangs 19 posters.  \n• The second grade hangs 24 posters.  \n• The third grade hangs 27 posters, but 8 fall down.  \nHow many posters are still hanging in the hallway?  \n• Equation:    \n• Answer:   posters  \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  \n1. 28 + 16 = 44 poster boards  \n2. 45-17 = 28 balloons  \n3. 32 + 19 = 51 displays  \n4. 50-23 = 27 pairs of goggles  \n5. 37 + 28 = 65 tickets  \n6. 64-29 = 35 notebooks  \n7. 40-18-9 = 13 ribbons  \n8. 56 + 34-27 = 63 visitors  \n9. 48-15 + 6 = 39 battery packs  \n10.19 + 24 + 27-8 = 62 posters  \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)","cbCaik3zhS3Ml3Uz","https://ap.wps.com/l/cbCaik3zhS3Ml3Uz","pdf",2298159,"English","# Mixed Addition & Subtraction Word Problems\n## Directions\n## Problems 1-10\n## Answer Key","[{\"question\":\"What should students do for each mixed addition and subtraction word problem?\",\"answer\":\"Read the story problem, decide if addition or subtraction is needed, write an equation, and solve it. Show work when extra space is needed.\"},{\"question\":\"Are these problems about a specific school event?\",\"answer\":\"Yes. All scenarios are connected to the school science fair, including items like posters, tickets, notebooks, ribbons, and visitors.\"},{\"question\":\"Is there an answer key included?\",\"answer\":\"Yes. The document includes an answer key listing the equations and final answers for problems 1 through 10.\"}]","Mixed Addition & Subtraction Word Problems - Mixed Addition & Subtraction - Solve the Science Fair Questions | PDF",1790141612]