Answer Keys for Calvert Math

Transcription

1 Answer Keys for Calvert Math Lessons CMAKD- Contents Math Textbook... Math Workbook... Math Manual...

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3 Answer Keys Math Textbook Lessons Math Textbook Answer Key Lessons Cumulative Test d b a c b d d d c b. Ratios Chapter /; to ; : /; to ; : /; to ; : /; to ; : /; to ; : or /; to ; : /; to ; : or /; to ; : / / / / / / / / / / / / / = / / = /; to ; : Sample answer: The correct ratio is /. Kimmy should add the turkey sandwiches into the total number of sandwiches, so / = /.. Rates mi/ days = mi/ day $/ tickets = $/ ticket L/ days = L/ days $/ lb = $/ lb miles per gallon (mpg) cars per hour $ per ticket $. per kg km per hr (km/h). m per second (m/s) miles per hour (mph) m per hour (m/hr) revolutions per second (rps). lbs per week $. per month $. per unit $. per roll. miles per hour (mph) Martin: mi/ hr = miles per hour; Benitez: mi/ hours = miles per hour (mph); the Martin family miles; miles; miles a. cents per ounce b. cents per ounce c Sample answer: Ben should buy his orange juice at the wholesale club. He will get more orange juice for his money. Test Prep c c. Proportions = = = = = = = a = b = h = t = c = z = x = y = x = y = k = f = n = g = s =. p =. y =. c =. r =. c =. c = z = r = g =. $. cups. kg, bushels. miles. Problem-Solving Strategy: Use a Proportion $. for oz $. for lbs $. for $. for oz $. for sq ft /. = /x; x = $. / = x/; x = Solve / = x/; x =, words / = x/; x = oz for $. /. = /x; x = cups /$. =./x; x = $. $./. = $. per hour See the student s work. $. $. Mixed Review x = y = - x = - m = x = b = - m = x =. Scale Drawings km km km km km km. cm. cm. cm. cm Answers may vary, based on student s measurements. Sample answers: meters. meters. meters meters. meters. meters. meters. meters. meters Check the student s work for accuracy. The distance should be about. meters.. kilometers Mind Builder: Similarity and Geometry true false true false CMAKD

4 Math Textbook Answer Key Lessons. Problem-Solving Application: Using Indirect Measurement / = x/; x =. meters Solve./. = /x; x. meters / = /x; x = / feet approximately. in.. in. Mid-Chapter Review / / $. per gallon $. per map b = f = cm/ km = cm/ km; km / = x/.; x = / miles Patsy s Pizza Pie Problem Extension n(n+)/ + piece Cumulative Review, x = a = m =. c =. m / cups Let x = Monday; x + = is Tuesday; laps on Monday in.. Estimation: Using Percents / of / of / of / of / of / of / of / of / of Accept reasonable estimates. Sample answers: c b b b c c % % /% /% % % about % $. Jill See student s work. Mixed Review t =. n =. y = s =. v = b =. v =. u =. x/. = /; x = $. x/ = /; x = x/ =./; x = x/. = /; x = $. x/ = /; x = x/ = /; x = x/ = /; x = x/ =./; x = x/ = /; x = x/ = /; x = x/ = /; x = $. x/ = /; x = x/ = /; x = x/ = /; x = x/ = /; x = x/ =./; x = x/ =./; x = x/ = /; x = a $. b Yes, she will save $.. Sample answer: Andrea s answer of is not reasonable. % = /, and / of is. Andrea forgot to change the percent to a decimal before making her calculation. Sam earns $. per hour, which is cents more per hour. Marco put $ down, but he still owes $. Test Prep d b c. Percent Proportions / = x/; x = % / = x/; x = % /x = /; x = /x = /; x = / = x/; x = /% /x =./; x = % % % /% % /% /. /% $. empty seats $. votes a $, b Sample answer: Mr. Diaz spends $ each month on food because % of $, is $. Test Prep b c c. Finding Discounts and Sales Tax. Finding the Percent of a Number x/ = / x/ = / x/ = / x/ = / Item. Toy. Chair. Picture Original Price $. $. $. Sale % off % off % off Discount $. $. $. $. Sale Price $. $. $. $.. Suit $. % off CMAKD

5 Math Textbook Answer Key Lessons Item. Ball. Clock. Shoes. Shirt Price $. $. $. $. Tax % % %.% Sales Tax $. $. $. $. Final Price $. $. $. $. $. $. $. $. $. They both are. Sample answer: No,. is % of $., not %. Juanita should multiply by. instead of.. Mixed Review x = - x = - x = - x =. x = x = Chapter Test / / / planes per hour km per hour (km/h) miles per gallon (mpg) h =. b =. d =. n =. km, km % %, /% $ feet $ $.; $. $ The better buy is at Tom s TV. % of $ = $.; $. = $.. % of $ = $.; $. = $.. Change of Pace Compound Interest $.,.% $.,.% $,.;.% $,.,.% See student s work. Cumulative Test b b d d c b b c b a. Problem-Solving Application: Finding Simple Interest $ $ $ $ $ $ Solve $; $, $; $ $; $ $; $, $; $, $; $ $.; $. $.; $. $.; $. $.; $, $.; $,. $.; $, $,.; $.. $,.; $,. $. She paid $, which was.%. / years Sample answer: Tim will have more money after years. Tim:. = ; $ + $ = $; John:. =.; $ + $. = $. Chapter Review Language and Concepts rate proportion scale drawings ratio number cross products unit rate Skills and / / / $ per meal cars per hour cents per pen x = b = s =. k =. m = n =. a =. t =. / of / of / of / of / of / of b c b b % % /% /% % %. % /% %, km feet $ $. $; $; $ $. Sample answer: / = $. per roll; /. = $. per roll; Greg s Groceries is the better bargain. CMAKD

6 Math Workbook Answer Key Answer Keys Math Workbook Lessons Lessons Practice Ratios Chapter / / / / / / / / / or / / / / / / / / / / / / / / = / / = / / = / Sixth and Eighth Grades / = / / = / Practice Rates sandwiches/person $/ticket pts/game mi/gallon oz/cup $./in. lb/month $./lb / mi/min / page/min $./lb Kyle gallon Heidi Practice Proportions = = = = = = = = = = = x = c =. a = s = b = f = r =. z =. y =. t = k = n =. m = e = d = r =.. cups yellow gumballs g, males,,, Practice Problem-Solving Strategy: Use a Proportion./ =./x, x = hrs / = m/, m = mi / = m/, m = mi / = p/, p = mi / = /t, t = / hr /. = b/, b = bushels a b b a patients cookies Enrichment Analogies sphere area in.. quotient decagon Practice Scale Drawings m m m m m m m m a m b m a m b m a m b m Practice Problem-Solving Application: Using Indirect Measurement x = ft, in. b = ft y = / ft / = /x, x = ft /s =./, s = ft./ = x/, x = $../ = x/, x = $./month m = - x = - x = p = - Practice Estimation: Using Percents / of / of / of / of / of / of Answers may vary. or or or or, or or % / % / Accept any estimate close to the actual solution of.% with a good explanation. Possible solutions: Round / to /; the estimate is %. Round / to /; the estimate is.%. $. % Practice Finding the Percent of a Number... questions, eggs DVDs students a $, b $, c $. mi/day months/yr km/hr passengers/car / / / / Practice Percent Proportions % % % % % % % % /% % /% % /% % Seventh Graders % % % % % % % people /% / in. / / / / / / Practice Finding Discounts and Sales Tax $, $ $, $ $., $. $., $. $, $ $., $. (Discounts are rounded down.) $., $. $., $. $., $. $., $. $., $. $.,. $., $. $. $. $. $. (round up) $. $. b =. z =. a =,,,. Practice Problem-Solving Application: Finding Simple Interest $ $ $ $. $, $ $; $, $, $ $; $, $; $, CMAKD

7 Math Workbook Answer Key Lessons $,; $, $; $, $; $, $; $, $; $, a $, $ b $,; $, c $.; $,. d $,; $, $,... R Enrichment Federal Income Tax $ $, $, $, $, $ $, $, Review Chapter Review / / / / $/person pts/game in./ft x =. x =. x = x =. x =. x =. x = x = / of = / of = / of = / of = / of = / of = Answers may vary.. x = (), x = (.) = x, x =. (.) = x, x = x() =, x = % (.) = x, x =. x() =, x = % x/ = /, x = x/ = /, x = / = x/, x = % / = x/, x = % x/ = /, x = / / = x/, x = % $., $. $. $. (Discounts are rounded down, and tax is rounded up.) $. (Interest is rounded up on loans.) Remember:.% =.. Test Chapter Test Prep c c b d c c a c.... CMAKD

8 Math Manual Answer Key Answer Keys Math Manual Lessons Lessons Warm-up / / / Warm-up LESSON LESSON / or / / or / / or / / or / / or / Warm-up LESSON..... Eighth Review Lesson / $. $. for ounces n =. %. $. $. $, CMAKD