Write a problem that can be modeled with the equation x + 4 = 12. Be sure to provide all the necessary information.

Transcription

1 Activity Start Thinking! For use before Activity Write a problem that can be modeled with the equation + 4 = 1. Be sure to provide all the necessary information. Activity Warm Up For use before Activity = 10. y + 13 = 1 3. z + 3 = 7 4. a 1 = b 9 = = c 1 39

2 Lesson Start Thinking! For use before Lesson Eplain how to use the distance formula ( d = rt) to find your average rate getting to school in the morning. Be sure to include units in your eplanation. Lesson Warm Up For use before Lesson 1. 5 = = 8w = 7b 4. 7 = v = p 6. k 4 = 6 40

3 Name Date Practice A t 1. = 9. 4 = w = s 7 = a = d = = 0m 8. 7g = y = n = = v c = b = h 15 = k = = 7r Describe and correct the error in solving the equation = = 3 9 = 3 4 z = 3 4 z = z = A teacher tells 36 students to form 4 equal groups. Write and solve a multiplication equation to find how many students s there should be in each group. 0. You have been saving $1 each week for many weeks. One day, you decide to count your savings and find that you have $384. Write and solve a multiplication equation to find how many weeks w you have been saving. 1. A 14-inch pepperoni pizza is sliced into 8 equal pieces. One slice contains 35 calories. Write and solve a division equation to find how many calories c there are in the whole pizza.. In a cheerleading competition, each team receives scores in eight categories. One team has a mean score of 7.5 in the eight categories. Write and solve an equation to find the team s total score s. 3. Write and solve an equation to find the width w of the rectangle. Eplain how you know what units to use with the answer. Area = 576 cm 36 cm 41

4 Name Date Practice B 1. 6a = = s = 4 p 4. 5g 18 = v 3 = 16 c = = b = Solve for. Check your answer. 9. Rectangle 10. Triangle 11. Parallelogram Area = 84 square units Area = 133 square units Area = 75 square units You want to know the side length of the square swimming pool. Eplain how you can use the perimeter. Then find the side length to the nearest yard. Perimeter = 100 yards 13. Your family has a car with a 15-gallon gas tank. Find the price of one gallon of gas in your area. Then write and solve a division equation to find the price p to fill the car s gas tank when it is empty. 14. Using a special discount, you download 15 songs for $ The regular price of each song is $0.89. What is the percent of the discount? 15. In a cranberry punch recipe, four cups of cranberry juice and one quart of pineapple juice make up half of the punch. How many cups of punch does the recipe make? 16. You buy dog biscuits at the bulk rate price of $.5 per pound. The scale shows the weight of 5 biscuits. Find the cost of 40 biscuits. Eplain how you found your answer. 4

5 Name Date Enrichment and Etension Writing Repeating Decimals as Fractions Eample: Write 0.1 as a fraction. Step 1: Let = 0.1 or Step : Because the decimal has repeating digits, multiply each side of = by 10, or 100. = = Step 3: Subtract from = = = 1 Step 4: Solve for. 99 = = =, or Write equation. Multiply each side by 100. Write equation. Subtract. Simplify. Write equation. Divide each side by 99. Simplify. So, 0.1 is equivalent to Write the decimal as a fraction or mied number How can you use the method shown above to write the decimal 0.3 as a fraction? Eplain. 43

6 Name Date Puzzle Time What Did The Dirt Say When It Began To Rain? A B C D E F G H I J K L M N O P Complete each eercise. Find the answer in the answer column. Write the word under the answer in the bo containing the eercise letter. 7 NAME 56 WILL 54 IF 9 MUD 10 MY 13 WILL CALLED a A. 6 9 = B. 7 C. y 4 = 10 D. 5 = z 6 = k 5 E. s = 16 F. 8 t = 96 G. 50 = 5 H. 56 = 8k I. 4b = 5 J. 39 = 6 c K. 14 = n 5 L. 10 = v 6 w M. 16 = 3.5 N = O d = 3 P. 4.5v = UP 6.5 CHANGE 15 RAIN 110 BE 4 THIS 8 KEEPS 60 I 40 HEAVY 70 AND 44