2 nd 9-Weeks Review
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Transcript of 2 nd 9-Weeks Review
2nd 9-Weeks Review
Topic: Multiples & Factors
Question: Find the first 5 multiples of 24.&List all of the factors of 24.
Answer: Multiples: 24, 48, 72, 96, 120
Factors: 1, 2, 3, 4, 6, 8, 12, 24
Topic: Prime Factorization
Question:Decompose 102 into its prime
factorization.
Answer: 102
2 51 2 ∙ 3 ∙ 17
3 17
Topic: Prime Factorization
Question:Decompose 72 into its prime
factorization using exponents.
Answer: 72
4 18 23 ∙ 32
2 2 2 9 3 3
Topic: GCF & LCM
Question:Find the Greatest Common Factor
of 36 & 84.
Answer: 3 36 84 4 12 28 GCF = 3 ∙ 4 = 12 3 7
Topic: GCF & LCM
Question:Find the Lowest Common Multiple of
24 & 18.
Answer: 2 24 18 3 12 9 LCM = 2 ∙ 3 ∙ 4 ∙ 3 = 72 4 3
Topic: Using GCF & LCM
Question:If hamburger buns come in packages of 8
and hamburger patties come in packages of 12. What is the least amount of hamburgers you can make buying whole packages of buns and patties?
Answer: 2 8 12 2 4 6 LCM = 2 ∙ 2 ∙ 2 ∙ 3
= 24 2 3 24 hamburgers
Topic: Equivalent Fractions
Question:Find the equivalent fraction.
2 = 18 5 ?
Answer:2 = 18
5 45
Topic: Mixed Numbers & Improper Fractions
Question:Change the mixed number to an improper fraction.
5 ¾
Answer:5 ¾ = 23 4
Topic: Decimals to Fractions
Question:Change the Decimal to a fraction.
0.88
Answer:0.88 = 88 = 44 = 22
100 50 25
Topic: Fractions to Decimals
Question:Change the fraction to a decimal.
1 9
Answer: 0.1119 1.000 0.1
-9 10 -9 1
Topic: Decimals to Percents
Question:If you have $0.61 what percent of a dollar do you have?
Answer:$0.61 = 61%
Topic: Percents to Decimals
Question:If you have 55% of a dollar, how much money is that?
Answer:55% = $0.55
Topic: Percents to Fractions
Question:Change the percent to a fraction.
40%
Answer:40% = 40 = 2
100 5
Topic: Fractions to Percents
Question:Change the fraction to a percent.
5 8
Answer:5 = ? 5 ∙ 100 = 8 ∙ ?
8 100 500 = 8 ∙ ? 8 8 62.5% = ?
Topic: Adding Fractions
Question:
Answer:5 + 3 = 8 2 + 1 = 3 = 1 1+8 = 9
3 3 3
Topic: Adding Fractions
Question:
Answer: 18 + 5 = 2330 30 30
Topic: Subtracting Fractions
Question:
Answer:32 - 21 = 1156 56 56
Topic: Subtracting Fractions
Question:
Answer:
3 9 1 16 2 33 1 16 1 17 24 - 24 = 24 - 24 = 24
Topic: Multiplying Fractions
Question:
Answer:30 = 15 = 548 24 8
Topic: Multiplying Fractions
Question:
Answer:
8 · 3 = 24 = 4 3 2 6
Topic: Dividing Fractions
Question:
Answer:
3 · 5 = 15 = 3 34 1 4 4
Topic: Dividing Fractions
Question:
Answer:17 · 12 = 204 = 51 8 10 80 20
Topic: Solving Equations
Question:Solve:
½ = ¾b
Answer:1 · 4 = 4 = 2
2 3 6 3
Topic: Solving Equations
Question:Solve:
1 + b = 5 6 8
Answer:5 - 1 = 15 - 4 = 11 8 6 24 24 24
Topic: Solving Equations
Question:Solve:
b – 7 = 2 4 8 5
Answer:
2 4 + 7 = 2 32 + 35 = 2 67 = 3 27 5 8 40 40 40 40
Topic: Solving Equations
Question:Solve:
b ÷ 2 = 5 5 10
Answer:5 · 2 = 10 = 1
10 5 50 5
Topic: Ratios
Question:A cake recipe calls for 2 cups sugar
and 5 cups flour. If you want to reduce the recipe and only use 1 cup of sugar, how much flour do you need?
Answer: 2.5 cups flour
Topic: Rates
Question:Which is the better buy?
6 video games for $67.923 video games for $33.60
Answer:Unit rate: 6 @ $11.32 each
Unit rate: 3 @ $11.20 each 3 for $33.60 is the better buy
Topic: Proportions
Question:Set up and solve using a proportion.
Suzie can run 2 miles in 22 minutes. How long will it take her to run 2 ½
miles?
Answer:22 min = ?___ 22 ∙ 2.5 = 2 ∙ ?
2 mile 2.5 miles 55 = 2 ∙ ? 2 2 27.5 = ? 27.5 minutes
Topic: % of a number
Question:On a $55.00 dinner bill you want to leave 15% tip. What is 15% of $55.00?
Answer:? = 15% 55 ∙ 15 = 100 ∙ ? or 55 or 100% ------- 55 55 100 825 = 100 ∙ ? ∙ .15 10%
------- 5.5 100 = 100 ∙ ? 275 5% ------- 2.75 $8.25 = ? +550 15% ------ 8.25
8.25
15% of $55.00 is $8.25