Number+Sense+and+Operations


 * Number, Number Sense and Operations ||  ||
 * 1.`Decompose and recompose whole numbers using factors and ||  ||   ||
 * exponents (e.g., 32 = 2 x 2 x 2 x 2 x 2 = 25 ), and explain why ||  ||   ||
 * “squared” means “second power” and “cubed” means “third ||  ||   ||
 * power.” ||  ||   ||   ||   ||   ||   ||   ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221990-...] ||
 * 2. Find and use the prime factorization of composite numbers. For ||  ||
 * example: ||  ||   ||   ||   ||   ||   ||   ||
 * a. Use the prime factorization to recognize the greatest common ||  ||   ||
 * factor (GCF). ||  ||   ||   ||   ||   ||   ||
 * b. Use the prime factorization to recognize the least common ||  ||   ||
 * multiple (LCM). ||  ||   ||   ||   ||   ||   ||
 * c. Apply the prime factorization to solve problems and explain ||  ||   ||
 * solutions. ||  ||   ||   ||   ||   ||   ||   ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L620] ||  ||
 * |||||||||| [| http://illuminations.nctm.org/index_o.aspx?id=100] ||  ||   ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=U125] ||  ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221990-...] ||
 * 3. Explain why a number is referred to as being “rational,” and ||  ||   ||
 * recognize expressions ||  ||   ||   ||   ||   ||
 * 4. Describe what it means to find a specific percent of a number, using ||  ||
 * real-life examples. ||  ||   ||   ||   ||   ||   ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/msmp/million/mi...] ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||||| [| http://ims.ode.state.oh.us/ODE/IMS/Assessment/Content/CMA_AI_200503_G...] ||
 * 5. Use models and pictures to relate concepts of ratio, proportion and ||  ||
 * percent, including percents less than 1 and greater than 100. ||  ||   ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/somethingf...] ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/msmp/noses/nose...] ||
 * 6. Use the order of operations, including the use of exponents, ||  ||   ||
 * decimals and rational numbers, to simplify numerical expressions. ||  ||
 * |||||||||||||| [|http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%222003-...] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221992-...] ||
 * |||||||||||||| http://www.usatoday.com/educate/mathtoday/reg_activities/Mortgages.pdf ||
 * 7. Use simple expressions involving integers to represent and solve ||  ||
 * problems; e.g., if a running back loses 15 yards on the first carry but ||  ||
 * gains 8 yards on the second carry, what is the net gain/loss? ||  ||   ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson03...] ||
 * 8. Represent multiplication and division situations involving fractions ||  ||
 * and decimals with models and visual representations; ||  ||   ||   ||
 * |||||||||| [| http://math.rice.edu/~lanius/fractions/index.html] ||  ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * 9. Give examples of how ratios are used to represent comparisons; e.g., ||  ||
 * part-to-part, part-to-whole, whole-to-part. ||  ||   ||   ||   ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/somethingf...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * 10. Recognize that a quotient may be larger than the dividend when the ||  ||
 * divisor is a fraction; ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * 11. Perform fraction and decimal computations and justify their ||  ||   ||
 * solutions; e.g., using manipulatives, diagrams, mathematical ||  ||   ||
 * reasoning. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=284] ||  ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=264] ||  ||   ||
 * |||||||||||||| [|http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson21...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||| [| http://math.rice.edu/~lanius/fractions/index.html] ||  ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%222003-...] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221992-...] ||
 * 12. Develop and analyze algorithms for computing with fractions and ||  ||
 * decimals, and demonstrate fluency in their use. ||  ||   ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%222003-...] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221992-...] ||
 * 13. Estimate reasonable solutions to problem situations involving fractions and decimals. ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson12...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * 14. Use proportional reasoning, ratios and percents to represent ||  ||   ||
 * problem situations and determine the reasonableness of solutions. ||  ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=284] ||  ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * |||||||||||||| http://www.usatoday.com/educate/mathtoday/reg_activities/InterestREVISED.pdf ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L367] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/somethingf...] ||
 * |||||||||||||| [|http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson21...] ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/msmp/noses/nose...] ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L176] ||  ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson12...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L255] ||  ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/pdf/msmp/greatr...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 15. Determine the percent of a number and solve related problems; e.g., ||  ||
 * find the percent markdown if the original price was $140, and the ||  ||   ||
 * sale price is $100. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 7. Use simple expressions involving integers to represent and solve ||  ||
 * problems; e.g., if a running back loses 15 yards on the first carry but ||  ||
 * gains 8 yards on the second carry, what is the net gain/loss? ||  ||   ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson03...] ||
 * 8. Represent multiplication and division situations involving fractions ||  ||
 * and decimals with models and visual representations; ||  ||   ||   ||
 * |||||||||| [| http://math.rice.edu/~lanius/fractions/index.html] ||  ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * 9. Give examples of how ratios are used to represent comparisons; e.g., ||  ||
 * part-to-part, part-to-whole, whole-to-part. ||  ||   ||   ||   ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/somethingf...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * 10. Recognize that a quotient may be larger than the dividend when the ||  ||
 * divisor is a fraction; ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * 11. Perform fraction and decimal computations and justify their ||  ||   ||
 * solutions; e.g., using manipulatives, diagrams, mathematical ||  ||   ||
 * reasoning. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=284] ||  ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=264] ||  ||   ||
 * |||||||||||||| [|http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson21...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||| [| http://math.rice.edu/~lanius/fractions/index.html] ||  ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%222003-...] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221992-...] ||
 * 12. Develop and analyze algorithms for computing with fractions and ||  ||
 * decimals, and demonstrate fluency in their use. ||  ||   ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%222003-...] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221992-...] ||
 * 13. Estimate reasonable solutions to problem situations involving fractions and decimals. ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson12...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * 14. Use proportional reasoning, ratios and percents to represent ||  ||   ||
 * problem situations and determine the reasonableness of solutions. ||  ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=284] ||  ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * |||||||||||||| http://www.usatoday.com/educate/mathtoday/reg_activities/InterestREVISED.pdf ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L367] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/somethingf...] ||
 * |||||||||||||| [|http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson21...] ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/msmp/noses/nose...] ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L176] ||  ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson12...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L255] ||  ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/pdf/msmp/greatr...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 15. Determine the percent of a number and solve related problems; e.g., ||  ||
 * find the percent markdown if the original price was $140, and the ||  ||   ||
 * sale price is $100. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 11. Perform fraction and decimal computations and justify their ||  ||   ||
 * solutions; e.g., using manipulatives, diagrams, mathematical ||  ||   ||
 * reasoning. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=284] ||  ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=264] ||  ||   ||
 * |||||||||||||| [|http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson21...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||| [| http://math.rice.edu/~lanius/fractions/index.html] ||  ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%222003-...] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221992-...] ||
 * 12. Develop and analyze algorithms for computing with fractions and ||  ||
 * decimals, and demonstrate fluency in their use. ||  ||   ||   ||
 * |||||||||||||| [| http://www.utdanacenter.org/mathtoolkit/instruction/lessons/7_divide....] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%222003-...] ||
 * |||||||||||||| [| http://nces.ed.gov/nationsreportcard/itmrls/qtab.asp?listarr=%221992-...] ||
 * 13. Estimate reasonable solutions to problem situations involving fractions and decimals. ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson12...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * 14. Use proportional reasoning, ratios and percents to represent ||  ||   ||
 * problem situations and determine the reasonableness of solutions. ||  ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=284] ||  ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * |||||||||||||| http://www.usatoday.com/educate/mathtoday/reg_activities/InterestREVISED.pdf ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L367] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/somethingf...] ||
 * |||||||||||||| [|http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson21...] ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/msmp/noses/nose...] ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L176] ||  ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson12...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L255] ||  ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/pdf/msmp/greatr...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 15. Determine the percent of a number and solve related problems; e.g., ||  ||
 * find the percent markdown if the original price was $140, and the ||  ||   ||
 * sale price is $100. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 14. Use proportional reasoning, ratios and percents to represent ||  ||   ||
 * problem situations and determine the reasonableness of solutions. ||  ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=284] ||  ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=252] ||  ||   ||
 * |||||||||||||| http://www.usatoday.com/educate/mathtoday/reg_activities/InterestREVISED.pdf ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L367] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/somethingf...] ||
 * |||||||||||||| [|http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson21...] ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/msmp/noses/nose...] ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L176] ||  ||
 * |||||||||||||| [| http://filer.weblogger.com/earlyalgebraManilaWebsite/classes/Lesson12...] ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [| http://illuminations.nctm.org/LessonDetail.aspx?ID=L255] ||  ||
 * |||||||||||||| [|http://www.pbs.org/teachersource/mathline/lessonplans/pdf/msmp/greatr...] ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 15. Determine the percent of a number and solve related problems; e.g., ||  ||
 * find the percent markdown if the original price was $140, and the ||  ||   ||
 * sale price is $100. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||||| [| http://www.pbs.org/teachersource/mathline/lessonplans/msmp/fantasy/fa...] ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * 15. Determine the percent of a number and solve related problems; e.g., ||  ||
 * find the percent markdown if the original price was $140, and the ||  ||   ||
 * sale price is $100. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||
 * find the percent markdown if the original price was $140, and the ||  ||   ||
 * sale price is $100. ||  ||   ||   ||   ||   ||   ||
 * |||||||||| [| http://illuminations.nctm.org/index_d.aspx?id=279] ||  ||   ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L177] ||  ||
 * |||||||||||| [|http://illuminations.nctm.org/LessonDetail.aspx?ID=L266] ||  ||
 * |||||||||||| [| http://www.bced.gov.bc.ca/careers/aa/lessons/aom11.htm] ||  ||