{"id":111,"date":"2021-01-21T19:24:42","date_gmt":"2021-01-22T00:24:42","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/math021\/chapter\/review-subtraction\/"},"modified":"2025-07-09T18:19:06","modified_gmt":"2025-07-09T22:19:06","slug":"review-subtraction","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/math021\/chapter\/review-subtraction\/","title":{"raw":"Unit 3 Review: Subtraction","rendered":"Unit 3 Review: Subtraction"},"content":{"raw":"You will now practice all the skills you learned in Unit 3. Check your work using the answer key at the end of the review.\r\n
    \r\n \t
  1. Check out your subtraction facts.\r\n
      \r\n \t
    1. [latex]\\begin{align*}5\\\\-2\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    2. [latex]\\begin{align*}8\\\\-7\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    3. [latex]\\begin{align*}3\\\\-1\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    4. [latex]\\begin{align*}9\\\\-5\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    5. [latex]\\begin{align*}18\\\\-9\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    6. [latex]\\begin{align*}11\\\\-4\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    7. [latex]\\begin{align*}13\\\\-5\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    8. [latex]\\begin{align*}10\\\\-5\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    9. [latex]\\begin{align*}6\\\\-6\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    10. [latex]\\begin{align*}14\\\\-8\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    11. [latex]\\begin{align*}16\\\\-7\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    12. [latex]\\begin{align*}12\\\\-9\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    13. [latex]\\begin{align*}17\\\\-9\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    14. [latex]\\begin{align*}9\\\\-3\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    15. [latex]\\begin{align*}13\\\\-6\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
    16. [latex]\\begin{align*}15\\\\-8\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
    17. Subtract across or horizontally.\r\n
        \r\n \t
      1. 8 \u2212 6 =<\/li>\r\n \t
      2. 12 \u2212 5 =<\/li>\r\n \t
      3. 10 \u2212 10 =<\/li>\r\n \t
      4. 9 \u2212 8 =<\/li>\r\n \t
      5. 11 \u2212 6 =<\/li>\r\n \t
      6. 8 \u2212 4 =<\/li>\r\n \t
      7. 7 \u2212 3 =<\/li>\r\n \t
      8. 14 \u2212 9 =<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
      9. Find the differences.\r\n
          \r\n \t
        1. [latex]\\begin{align*}45\\\\-23\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        2. [latex]\\begin{align*}78\\\\-15\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        3. [latex]\\begin{align*}84\\\\-52\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        4. [latex]\\begin{align*}57\\\\-10\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        5. [latex]\\begin{align*}78\\\\-21\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        6. [latex]\\begin{align*}69\\\\-43\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        7. [latex]\\begin{align*}96\\\\-45\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        8. [latex]\\begin{align*}88\\\\-35\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
        9. [latex]\\begin{align*}95\\\\-33\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
        10. Find the differences.\r\n
            \r\n \t
          1. [latex]\\begin{align*}583\\\\-163\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          2. [latex]\\begin{align*}799\\\\-265\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          3. [latex]\\begin{align*}629\\\\-305\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          4. [latex]\\begin{align*}847\\\\-406\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          5. [latex]\\begin{align*}978\\\\-252\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          6. [latex]\\begin{align*}797\\\\-652\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          7. [latex]\\begin{align*}765\\\\-243\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          8. [latex]\\begin{align*}854\\\\-344\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          9. [latex]\\begin{align*}536\\\\-314\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          10. [latex]\\begin{align*}897\\\\-246\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          11. [latex]\\begin{align*}669\\\\-238\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n \t
          12. [latex]\\begin{align*}769\\\\-564\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
          13. Word problems.\r\n
              \r\n \t
            1. One week, Tiago changed 258 light bulbs in the building. The next week, Tiago changed 141 light bulbs. How many more bulbs did Tiago change the first week?<\/li>\r\n \t
            2. Anoki drove 769 kilometres while his friend Dasan drove 534 kilometres on their trip. How many more kilometres did Anoki drive?<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n

              Answers to Unit 3 Review<\/h1>\r\n
                \r\n \t
              1. \r\n
                  \r\n \t
                1. 3<\/li>\r\n \t
                2. 1<\/li>\r\n \t
                3. 2<\/li>\r\n \t
                4. 4<\/li>\r\n \t
                5. 9<\/li>\r\n \t
                6. 7<\/li>\r\n \t
                7. 8<\/li>\r\n \t
                8. 5<\/li>\r\n \t
                9. 0<\/li>\r\n \t
                10. 6<\/li>\r\n \t
                11. 9<\/li>\r\n \t
                12. 3<\/li>\r\n \t
                13. 8<\/li>\r\n \t
                14. 6<\/li>\r\n \t
                15. 7<\/li>\r\n \t
                16. 7<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                17. \r\n
                    \r\n \t
                  1. 2<\/li>\r\n \t
                  2. 7<\/li>\r\n \t
                  3. 0<\/li>\r\n \t
                  4. 1<\/li>\r\n \t
                  5. 5<\/li>\r\n \t
                  6. 4<\/li>\r\n \t
                  7. 4<\/li>\r\n \t
                  8. 5<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                  9. \r\n
                      \r\n \t
                    1. 22<\/li>\r\n \t
                    2. 63<\/li>\r\n \t
                    3. 32<\/li>\r\n \t
                    4. 47<\/li>\r\n \t
                    5. 57<\/li>\r\n \t
                    6. 26<\/li>\r\n \t
                    7. 51<\/li>\r\n \t
                    8. 53<\/li>\r\n \t
                    9. 62<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                    10. \r\n
                        \r\n \t
                      1. 420<\/li>\r\n \t
                      2. 534<\/li>\r\n \t
                      3. 324<\/li>\r\n \t
                      4. 441<\/li>\r\n \t
                      5. 726<\/li>\r\n \t
                      6. 145<\/li>\r\n \t
                      7. 522<\/li>\r\n \t
                      8. 510<\/li>\r\n \t
                      9. 222<\/li>\r\n \t
                      10. 651<\/li>\r\n \t
                      11. 431<\/li>\r\n \t
                      12. 205<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                      13. \r\n
                          \r\n \t
                        1. 117 light bulbs<\/li>\r\n \t
                        2. 235 kilometres<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\n
                          \r\n

                          CONGRATULATIONS!!<\/p>\r\n

                          Now you have finished Unit 3.<\/p>\r\n

                          TEST TIME!<\/p>\r\n

                          Ask your instructor for Unit 3 Test.<\/p>\r\n

                          GOOD LUCK!<\/p>\r\n\r\n<\/div>","rendered":"

                          You will now practice all the skills you learned in Unit 3. Check your work using the answer key at the end of the review.<\/p>\n

                            \n
                          1. Check out your subtraction facts.\n
                              \n
                            1. [latex]\\begin{align*}5\\\\-2\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            2. [latex]\\begin{align*}8\\\\-7\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            3. [latex]\\begin{align*}3\\\\-1\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            4. [latex]\\begin{align*}9\\\\-5\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            5. [latex]\\begin{align*}18\\\\-9\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            6. [latex]\\begin{align*}11\\\\-4\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            7. [latex]\\begin{align*}13\\\\-5\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            8. [latex]\\begin{align*}10\\\\-5\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            9. [latex]\\begin{align*}6\\\\-6\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            10. [latex]\\begin{align*}14\\\\-8\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            11. [latex]\\begin{align*}16\\\\-7\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            12. [latex]\\begin{align*}12\\\\-9\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            13. [latex]\\begin{align*}17\\\\-9\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            14. [latex]\\begin{align*}9\\\\-3\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            15. [latex]\\begin{align*}13\\\\-6\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                            16. [latex]\\begin{align*}15\\\\-8\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                            17. Subtract across or horizontally.\n
                                \n
                              1. 8 \u2212 6 =<\/li>\n
                              2. 12 \u2212 5 =<\/li>\n
                              3. 10 \u2212 10 =<\/li>\n
                              4. 9 \u2212 8 =<\/li>\n
                              5. 11 \u2212 6 =<\/li>\n
                              6. 8 \u2212 4 =<\/li>\n
                              7. 7 \u2212 3 =<\/li>\n
                              8. 14 \u2212 9 =<\/li>\n<\/ol>\n<\/li>\n
                              9. Find the differences.\n
                                  \n
                                1. [latex]\\begin{align*}45\\\\-23\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                2. [latex]\\begin{align*}78\\\\-15\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                3. [latex]\\begin{align*}84\\\\-52\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                4. [latex]\\begin{align*}57\\\\-10\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                5. [latex]\\begin{align*}78\\\\-21\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                6. [latex]\\begin{align*}69\\\\-43\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                7. [latex]\\begin{align*}96\\\\-45\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                8. [latex]\\begin{align*}88\\\\-35\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                9. [latex]\\begin{align*}95\\\\-33\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                10. Find the differences.\n
                                    \n
                                  1. [latex]\\begin{align*}583\\\\-163\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  2. [latex]\\begin{align*}799\\\\-265\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  3. [latex]\\begin{align*}629\\\\-305\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  4. [latex]\\begin{align*}847\\\\-406\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  5. [latex]\\begin{align*}978\\\\-252\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  6. [latex]\\begin{align*}797\\\\-652\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  7. [latex]\\begin{align*}765\\\\-243\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  8. [latex]\\begin{align*}854\\\\-344\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  9. [latex]\\begin{align*}536\\\\-314\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  10. [latex]\\begin{align*}897\\\\-246\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  11. [latex]\\begin{align*}669\\\\-238\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n
                                  12. [latex]\\begin{align*}769\\\\-564\\\\ \\hline\\\\ \\end{align*}[\/latex]<\/li>\n<\/ol>\n<\/li>\n
                                  13. Word problems.\n
                                      \n
                                    1. One week, Tiago changed 258 light bulbs in the building. The next week, Tiago changed 141 light bulbs. How many more bulbs did Tiago change the first week?<\/li>\n
                                    2. Anoki drove 769 kilometres while his friend Dasan drove 534 kilometres on their trip. How many more kilometres did Anoki drive?<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

                                      Answers to Unit 3 Review<\/h1>\n
                                        \n
                                      1. \n
                                          \n
                                        1. 3<\/li>\n
                                        2. 1<\/li>\n
                                        3. 2<\/li>\n
                                        4. 4<\/li>\n
                                        5. 9<\/li>\n
                                        6. 7<\/li>\n
                                        7. 8<\/li>\n
                                        8. 5<\/li>\n
                                        9. 0<\/li>\n
                                        10. 6<\/li>\n
                                        11. 9<\/li>\n
                                        12. 3<\/li>\n
                                        13. 8<\/li>\n
                                        14. 6<\/li>\n
                                        15. 7<\/li>\n
                                        16. 7<\/li>\n<\/ol>\n<\/li>\n
                                        17. \n
                                            \n
                                          1. 2<\/li>\n
                                          2. 7<\/li>\n
                                          3. 0<\/li>\n
                                          4. 1<\/li>\n
                                          5. 5<\/li>\n
                                          6. 4<\/li>\n
                                          7. 4<\/li>\n
                                          8. 5<\/li>\n<\/ol>\n<\/li>\n
                                          9. \n
                                              \n
                                            1. 22<\/li>\n
                                            2. 63<\/li>\n
                                            3. 32<\/li>\n
                                            4. 47<\/li>\n
                                            5. 57<\/li>\n
                                            6. 26<\/li>\n
                                            7. 51<\/li>\n
                                            8. 53<\/li>\n
                                            9. 62<\/li>\n<\/ol>\n<\/li>\n
                                            10. \n
                                                \n
                                              1. 420<\/li>\n
                                              2. 534<\/li>\n
                                              3. 324<\/li>\n
                                              4. 441<\/li>\n
                                              5. 726<\/li>\n
                                              6. 145<\/li>\n
                                              7. 522<\/li>\n
                                              8. 510<\/li>\n
                                              9. 222<\/li>\n
                                              10. 651<\/li>\n
                                              11. 431<\/li>\n
                                              12. 205<\/li>\n<\/ol>\n<\/li>\n
                                              13. \n
                                                  \n
                                                1. 117 light bulbs<\/li>\n
                                                2. 235 kilometres<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
                                                  \n

                                                  CONGRATULATIONS!!<\/p>\n

                                                  Now you have finished Unit 3.<\/p>\n

                                                  TEST TIME!<\/p>\n

                                                  Ask your instructor for Unit 3 Test.<\/p>\n

                                                  GOOD LUCK!<\/p>\n<\/div>\n","protected":false},"author":999,"menu_order":8,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-111","chapter","type-chapter","status-publish","hentry"],"part":105,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/pressbooks\/v2\/chapters\/111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/wp\/v2\/users\/999"}],"version-history":[{"count":3,"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/pressbooks\/v2\/chapters\/111\/revisions"}],"predecessor-version":[{"id":185,"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/pressbooks\/v2\/chapters\/111\/revisions\/185"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/pressbooks\/v2\/parts\/105"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/pressbooks\/v2\/chapters\/111\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/wp\/v2\/media?parent=111"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/pressbooks\/v2\/chapter-type?post=111"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/wp\/v2\/contributor?post=111"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/math021\/wp-json\/wp\/v2\/license?post=111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}