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Review

Review. 1) 45% of 355 is what?. Translate: Change the percent to a decimal What does “of” mean? What does “is” mean? What does “what” mean? Do the math. 2) 82 is 90% of what?. Translate: What does “is” mean? Change the percent to a decimal What does “of” mean? What does “what” mean?

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Review

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  1. Review

  2. 1) 45% of 355 is what? • Translate: • Change the percent to a decimal • What does “of” mean? • What does “is” mean? • What does “what” mean? • Do the math.

  3. 2) 82 is 90% of what? • Translate: • What does “is” mean? • Change the percent to a decimal • What does “of” mean? • What does “what” mean? • Do the math.

  4. 3) 36 is what % of 100? • Translate: • What does “is” mean? • What does “what” mean? • What does “of” mean? • Do the math. Make sure your answer is a percent.

  5. 4) Amy sells stuffed animals. If she has a stuffed animal that she sells for $18.60, what is the sales tax on the animal if the sales tax is 4% of the sale price • What is the question asking for? • How do you find SALES TAX? • Percent times price • Change the percent to a decimal • Do the math.

  6. 5) The price of the DVD went from $14 to $19. What was the percent of increase? • What is the question asking for? • What is the formula for percent of change? • 1. Subtract • 2. Divide by the original • 3. Multiply by 100 to change to a percent.

  7. 6) When water boils, a portion of the water escapes as gas. If a pan is filled with 21.1 gallons of water and set to boil, how much water is removed if 5% of the water escapes as gas? • What is the question asking? • Translate: 5% of the water • Do we know how much water we started with? • “a pan is filled with 21.1 gallons of water” • Translate and do the math.

  8. 7) ABC Shoes is in competition with High Low Shoes. Both stores sell the High Runner shoe. ABC Shoes sells the shoes for $35.60. High Low Shoes sells the same shoes for $24.80. On the weekend, ABC Shoes decides to offer a 20% discount on these shoes. Calculate the new price at ABC shoes. • What is the question asking? • What kind of problem is this? • Shoes are on sale/discount/% off. • How do we do problems like this? • Percent you DO PAY times price. • Do the math.

  9. 8) 9(-3 - 5) • Read the problem. Pay attention to ‘minus’. • What do we do with ‘minus’? • Add-the-opposite • Do the math

  10. 9) If a bank offers a savings account that pays simple interest of 5% and you deposit $425 into this account, how much interest will you have earned after 5 years? • What kind of problem is this? • What is the question asking? • What is the formula for INTEREST? • I = PRT • Substitute and do the math

  11. 10) Solve: 11 + b = -22 • What does ‘solve’ mean? • Get the variable by itself. • Use inverse operation. What is the opposite of 11? • What you do to one side you do to the other side. • Do the math.

  12. 11) Solve: x + 2 > 5 • What does ‘solve’ mean? • Get the variable by itself. • Use inverse operation. What is the opposite of +2? • What you do to one side you do to the other side. • Do the math. • Keep the > sign.

  13. 12) Use the distributive property then simplify. 7(8a - 4) + 2a • First, read the question. What does ‘minus’ tell us to do? • What is the question telling us to do? • How do you use the distributive property? • Multiply across the parenthesis. • How do you simplify this? • Combine like terms.

  14. 13) Evaluate: 5m - 5x if m =9 & x = 7 • What is the question asking you to do? • Use the substitute method. • Do the math.

  15. 14. To mix the color ‘autumn purple’, a painter mixes 28 parts of blue to 48 parts of red. What is the ratio of blue to red. Express the ratio in simplest form. • What type of question is this? • What is a ratio? • Pay attention to the order in the question. • What are the directions telling you to do? • Express ratio in simplest form.

  16. 15) Ellen needs new socks.Her mother can buy a package of 6 for $3.60 or a package of 9 for $4.80. Which is the better buy? • What kind of question is this? • How do you find the unit price for each package? • Divide: Money divided by item for each. • After you complete the math, what is the question?

  17. 16) In order to make 8 dozen cookies, you must use 3 eggs. How many eggs would be needed to make 48 dozen cookies. Use proportions to solve. • What is the questions telling you to do? • What is a proportion? • Proportion - equal ratios. • Use labels if needed to get your numbers in the correct place. • Do the math.

  18. 17) A square rug has an area of 81 square feet. What is the measure of each side of the rug? • What kind of question is this? • Draw a square if needed. • Put the 81 inside the square. • How can you find the measure of the side? • Use square root. • Do the math.

  19. 18) 512 out of 600 seats are full. What percent of the seats are full? • What kind of question is this? • Percent: ‘out of’ • How do you do ‘out of’ problems? • Divide: part divided by total. • Change your answer to a percent.

  20. 19) Bath-R-Us sold 42 towels and 85 bath mats. What percent of sales of the two products were towels? • What is the question asking? • You need to find the percent that were towels. • So your problem will be towels divided by . . . • {think about the last question . . .} • The bottom number in a fraction is the total. • Do the math. Is your answer a percent?

  21. What does this question tell us about each kind of chip? What can you do to find the value of this set? Use ‘-1’ for each white chip and ‘1’ for each gray chip. Do the math. 20) In this set of chips, each plain chip has a value of -1 and each gray chip has a value of 1. What is the value of the set?

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