Student Edition - Mathematics in Context - Britannica

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CMany ChangesProfit FractionsThe owner of Save Supermarket, Ms. Jao, compared this year’sprofits to last year’s profits. This is what she found.DepartmentHealth and BeautyDairyProduceBakeryMeatDeliChange in ProfitOne-quarter lessOne-fifth lessOne-and-one-half times as muchThree-tenths lessOne-quarter moreTwo-thirds moreTo help her visualize the changes in profits, Ms. Jao used bars torepresent last year’s profits.7. a. Which departments increased profit from last year to this year?b. Use the bars on Student Activity Sheet 3 to indicate thechange in profit for each department. Label the bars.This year’s Health and Beauty profit can be described as three-fourthstimes ( 3 4) last year’s profit.8. Describe the change in profit for the other departments in fractions.The table below shows last year’s profit for each department ofMs. Jao’s store.DepartmentLast Year’s ProfitHealth and Beauty $46,800Dairy $35,600Produce $22,500Bakery $55,900Meat $60,200Deli $47,1009. For each department, use last year’s profit and the change inprofit to find this year’s profit.20 More or Less
Many ChangesCIn problem 9, Ms. Jao calculated this year’s profit for the bakery like this.She then used her calculator.710 55,900 0.7 55,90010. a. Compare Ms. Jao’s calculation to the bakery profit calculationyou made in problem 9. What is the same and what is different?b. How would Ms. Jao calculate this year’s profit for the Healthand Beauty department, using multiplication with decimals?Fractions can be written as decimals.11. On Student Activity Sheet 4, connect the fraction and decimalthat express the same number.3 41 1 21.50.3 1 50.4 31000.751040.25 1.250.033101 4251000.21 1 42 512. Describe how you can find the answer to these multiplicationproblems on a calculator that does not allow you to enterfractions.a. 3 4 1,257b. 1 1 4 1,257c.17100 1,257Section C: Many Changes 21
Page 1 and 2: Moreor LessNumber
Page 3 and 4: The Mathematics in Context Developm
Page 6 and 7: Dear Student,This unit is about the
Page 8 and 9: AProduce PricingCarol is a customer
Page 10 and 11: AProduce PricingWhen Carol is finis
Page 12 and 13: AProduce Pricing1.92Paul calculated
Page 14 and 15: AProduce PricingThere are many ways
Page 16 and 17: AProduce PricingPaul has $7 to spen
Page 18 and 19: BDiscountsThe second survey questio
Page 20 and 21: BDiscounts9. Choose three of your m
Page 22 and 23: BDiscounts• Results of a survey c
Page 24 and 25: CMany ChangesDesign a SignSave Supe
Page 28 and 29: CMany ChangesMs. Jao decided to use
Page 30 and 31: CMany ChangesTo calculate the sale
Page 32 and 33: DMore or LessEnlarge or ReduceMarit
Page 34 and 35: DMore or LessThe group wants to mak
Page 36 and 37: DMore or Less• A third method use
Page 38 and 39: DMore or LessIn this section, you s
Page 40 and 41: DMore or LessThe copier they are us
Page 42 and 43: Additional PracticeSectionBDiscount
Page 44 and 45: Additional PracticeDuring his prese
Page 46 and 47: Answers to Check Your WorkThe price
Page 48 and 49: Answers to Check Your Work• Calcu
Page 50 and 51: Answers to Check Your Work5. Answer
Page 52 and 53: Answers to Check Your Work• Using

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