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1 As you scroll through the slides Have the Unit 5 Study Guide in front of you printed or opened on your computer. Use the examples to help you on your test. Work out the problems on paper then put in your answer Use a calculator Mrs. Baker cannot help you answer the questions
2 Which fractions are equivalent to 4 12? a. 1 3 b c d. 8 24
3 Solve for n. 7 6 n = 28
4 What is ( 5 ) 2?
5 Which two fractions are greater than - 3 7? a b c d
6 Nemo swam 3 of a mile last night. Today, he swam he did last night. How far did he swim today? as far as
7 Multiply the improper fraction by the original amount. A recipe calls for 3 cups of sugar. Wyldstyle wants to make 25% more servings than the recipe makes. Which expression represents how many cups of sugar Wyldstyle should use? a. 1 4 * 3 b. 3 4 * 3 c. 5 4 * 3 d. 7 4 * 3 We would need to include the original 3 cups and add an additional 25%. First, change 25% to a fraction. 25% = 1 4 Then, add the fraction to 1 whole. (We want times the original amount.) Change the mixed number to an improper fraction. Answer: = 5 4
8 What is the fraction 8 terms? 18 expressed in lowest Divide by the GCF = 4 9
9 What is ? Write as fractions with the LCD 2 3 = =
10 Divide. Express your answer in lowest terms Put the whole number over Use KCF = Multiply Return to mixed number
11 Proportional Increase Kiah earns $9.20/hour working at Trunchbowls. Her boss decides to give her a raise of 12% per hour. Which expression represents how much money Kiah will earn per hour after the raise. A * 3 25 B * C * D * % = = 3 25 But, we want to add that to the original amount. So we actually want times the original amount = So the answer is B.
12 Proportional Increase Don used to earn $20 per hour. Now he earns 1 more money per hour. Which 5 expressions represent how much money Noah earns per hour now? Choose all answers that are correct. We want to find 1 5 and add it to 20. of 20, Answers: B, C, and D A. 1 * 20 5 B ( 1 * 20) 5 C D. 6 * 20 5 Answer B shows just that. Answer C is also correct. We are taking 20 times 1 plus the additional 1 5. Answer D is correct. It is the same as answer C, but the mixed number has been turned into an improper fraction.
13 Estimating Tim was 55 1 inches tall. Then he grew 2 1 inches. Which expression 14 7 should Tim use to estimate how many inches tall he is now? Since it asks us to estimate, we will round each value to the nearest inch rounds to 55 rounds to 2 Answer: D A * 2 B C. 55 * 2 D
14 Operations with Fractions (and negatives) ( 3 18 ) Multiply or Divide, it s an easy thought. Same signs are positive, different signs are not. Multiply numerator x numerator. Multiply denominator x denominator ( 3 18 ) = Simplify = 1 21
15 Operations with Fractions (and negatives) When adding or subtracting fractions, you need common denominators Use the rules for adding integers, to add the numerators. Leave the denominators the same = Simplify.
16 Operations with Fractions (and negatives) ( 3 4 ) - 2 ( 4 ) KFC Keep the first, flip the second, change division to multiplication, 9 3 Multiply numerator x numerator. Multiply denominator x denominator ( 4 3 ) = 8 27
17 - 7 3 Operations with Fractions (and negatives) ( ) 17 ( ) Convert to improper fractions. 5 Multiply numerator x numerator. Multiply denominator x denominator ( 17 5 ) = Turn BACK INTO mixed number
18 Operations with Fractions (and negatives) ( 8 15 ) ( 8 ) Use the rules for subtracting integers. KCC = Keep, Change, Change Use the rules for adding integers, to add the numerators. Leave the denominators the same = 2 5 Simplify.
19 Now what? Check your answers Submit your test Let Mrs. Baker know you are finished!
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