12-7.2F

GRADE 7 MATHEMATICS (7.2) Number, operation, and quantitative reasoning. The student adds, subtracts, multiplies, or divides to solve problems and justify solutions. The student is expected to: (F) select and use appropriate operations to solve problems and justify the selections.

Celeste bought 5 identical t-shirts and 4 pairs of socks for a total cost of $44.86, including tax.

Each pair of socks cost $1.19, including tax.   Write an expression that could be used to find the cost of each t-shirt, s, including tax.

  Determine the cost of each t-shirt.

1. What mathematical concepts and vocabulary do I need to know to be able to work this problem?

2. Will the Grade 7 Mathematics Formula Chart be helpful on this problem? Why or why not?

3. Will a picture or diagram be helpful on this problem? If so, how?

4. What problem-solving strategy or strategies will I use to help solve this problem?

5. Extension (7.2C): Draw a number line model for -4 + 2 +5 .

TEKSING TOWARD TAKS © 2006

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GRADE 7 MATHEMATICS (7.2) Number, operation, and quantitative reasoning. The student adds, subtracts, multiplies, or divides to solve problems and justify solutions. The student is expected to: (F) select and use appropriate operations to solve problems and justify the selections.

Celeste bought 5 identical t-shirts and 4 pairs of socks for a total cost of $44.86, including tax. Each pair of socks cost $1.19, including tax.   Write an expression that could be used to find the

cost of each t-shirt, s, including tax.

  Determine the cost of each t-shirt.

TEKSING TOWARD TAKS © 2006

Page 2

GRADE 7 MATHEMATICS (7.2) Number, operation, and quantitative reasoning. The student adds, subtracts, multiplies, or divides to solve problems and justify solutions. The student is expected to: (F) select and use appropriate operations to solve problems and justify the selections.

Mrs. Barry bought 1 dozen packages of spaghetti sauce mix priced at 3 packages for $1.29 and 4 packages of spaghetti priced at 2 for $2.79. What is the total amount she spent, not including tax, on the spaghetti and sauce?

Mary’s math test had 3 sections. The first section was a true-false section with each correct answer worth 2 points.

Mary answered 12 of those correctly. The second section was a multiple-choice section with each correct answer worth 3 points. Mary answered 9 of those correctly. The third section was a calculation section with each correct answer worth 12 points. Mary got 3 of these correct. What was Mary’s score on the test?

A

$10.74

B

$9.45

C

$4.08

A

75

D

$15.03

B

87

C

91

D

93

Jimmy is buying ground beef that is priced at 3 pounds for $4. He wants to buy 5 pounds. Which of the following represents the cost of 5 pounds?

A

$4 3 5

B

$4 3 5

Sue Ellen bought new towels for her bathroom. They were on sale for 40% off. If the regular price of a towel was $15, how much did Sue Ellen save if she bought 3 towels on sale?

C

$4 3 5 $3 4 5

A

$18

D

B

$9

C

$27

D

$6

Lorenzo is buying 3 dozen bottles of flavored drinks that are priced at 3 for $0.79 and 8 packages of hamburger buns that are priced at 2 for $0.89. What is the total amount he spent, not including tax, on the drinks and buns?

A

$9.49

B

$12.04

C

$13.04

D

$35.56

TEKSING TOWARD TAKS © 2006

Mr. Edison works at the electronic store in the mall. He earns 5% commission on all sales over $20,000 in the month. Last month he had sales of $24,000. What was his commission?

A

$2000

B

$1500

C

$1200

D

$200

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