Student Edition - Mathematics in Context - Britannica

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Additional PracticeDuring his presentation, Darnel plans to hand out two pictures. Thepictures are both 21 cm by 27 cm. The photocopier can reduce picturesonly to 75%, 70%, or 60%.2. Explain what Darnel can do to reduce his two pictures so theyboth fit onto one sheet of paper that is 21.5 cm by 28 cm and thepictures are as large as possible.Laura’s grandparents started a college fund for her on her twelfthbirthday. They put $500 in a savings account that earns 4% interestevery year.3. a. How much is in the account after one year? What percent ofthe original amount is this?b. When Laura enters college in six years, how much money willshe have in her account?38 More or Less
SectionAProduce Pricing1. a. There are different strategies to solve this problem, and thereare different good solutions. However, if your answer is notbetween $4.20 ( 2 $2.10) and $6.30 ( 3 $2.10), then youshould redo the problem or ask help from a classmate or yourteacher.Sample good solutions:• $5.20, because that is about halfway between $4.20and $6.30.• $4.62, because 2 kg of apples cost $4.20.0.1 kg of apples cost $0.21, so 0.2 kg cost $0.42.2.2 kg of apples cost $4.20 $0.42 $4.62.b. There are different strategies to solve this problem, and thereare different good solutions. However, if your answer is notbetween $1.05 ( 1 2 $2.10) and $2.10, then you should redothe problem or ask help from a classmate or your teacher.Sample good solutions:• $1.50, because that is about halfway between $1.05and $2.10.• $1.68, because 1 kg of apples cost $2.10.0.1 kg of apples cost $0.21, so 0.2 kg cost $0.42.0.8 kg of apples cost $2.10 $0.42 $1.68.2. Your answer should be a little more than 3 kg.Sample strategy:Three kg of apples cost $6.30, so Paul has $0.70 left($7 $6.30 $0.70).From here, there are different strategies to continue.• $0.70 is about $1, and 1 kg costs about $2.$1 out of $2 is 1 2, so he can buy 1 1 2 1 1 2 kg of apples.• One kg of apples costs $2.10$0.70 out of $2.10 is21070 is 1 3 , so he can buy 3 1 3 kg of apples.Answers to Check Your Work 39
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 26 and 27: CMany ChangesProfit FractionsThe ow
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 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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