Splash Screen. Lesson Menu Five-Minute Check (over Lesson 7–7) Main Idea Key Concept: Percent-Fraction Equivalents Example 1:Estimate the Percent of a.

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Presentation transcript:

Splash Screen

Lesson Menu Five-Minute Check (over Lesson 7–7) Main Idea Key Concept: Percent-Fraction Equivalents Example 1:Estimate the Percent of a Number Example 2:Estimate the Percent of a Number Example 3:Use Estimation to Solve a Problem Example 4:Use Estimation to Solve a Problem

Main Idea/Vocabulary Estimate the percent of a number.

KC 1 Animation: Estimating with Percents

Example 1 Estimate the Percent of a Number Estimate 49% of 302. Answer:So, 49% of 302 is about 150.

1.A 2.B 3.C 4.D Example 1 Estimate 26% of 122. A.20 B.30 C.40 D.50

Example 2 Estimate the Percent of a Number Estimate 80% of 1,605. Answer:Thus, 80% of 1,605 is about 1,280. or 1 tenth means divide by 10.

1.A 2.B 3.C 4.D Example 2 A.360 B.420 C.480 D.540 Estimate 40% of 1,207.

Method 1 Use a proportion. Example 3 MONEY A CD that originally cost $11.90 is on sale for 30% off. If you have $7, would you have enough money to buy the CD? To determine whether you have enough money to buy the CD, you need to estimate 70% of $ Use Estimation to Solve a Problem

Example 3 Use Estimation to Solve a Problem ×3 Since 4 × 3 = 12, multiply 3 by 3. Write the proportion.

Example 3 Answer: Since $8.40 is $1.40 more than $7, you would not have enough money. Use Estimation to Solve a Problem Method 2 Use mental math.

1.A 2.B 3.C 4.D Example 3 A.$5 B.$6 C.$10 D.$17 MONEY A poster that originally cost $14.90 is on sale for 40% off. Which amount of money would be just enough to buy the poster with a little left over?

Example 4 Claire surveyed her classmates about their favorite city in the United States. Predict the number of students out of 234 who would prefer New York City. Use Estimation to Solve a Problem A 20C 110 B 60D 240 Read the Item You need to estimate the number of students out of 234 that would prefer New York City. 26% of the students chose New York City.

Example 4 Answer:So, about 60 students would prefer New York City. The answer is B. Solve the Item Use Estimation to Solve a Problem

1.A 2.B 3.C 4.D Example 4 A.32 B.50 C.120 D.200 Monica surveyed her basketball team about their favorite type of restaurant. Predict the number of students out of 318 who would prefer an Italian restaurant.

End of the Lesson

Resources Five-Minute Check (over Lesson 7–7) Image Bank Math Tools Animation Menu Probability and Area

Animation Menu Circle GraphsCircle Graphs Estimating With PercentsEstimating With Percents

1.A 2.B 3.C 4.D Five Minute Check 1 A.$1.00 B.$1.20 C.$1.60 D.$2.00 Use the solve a simpler problem strategy to solve. MONEY Daniela wants to leave a 20% tip for her lunch which cost $7.85. About how much money should she leave for the tip? (over Lesson 7-7)

1.A 2.B 3.C 4.D Five Minute Check 2 A.650–910 Calories B.620–800 Calories C.750–960 Calories D.910–1,000 Calories Use the solve a simpler problem strategy to solve. HEALTH An active boy between the ages of 9 and 13 should eat about 2,600 Calories per day. Of these Calories, about 25% to 35% should come from fat. What is the approximate range of an active boy’s Calories that should come from fat? (over Lesson 7-7)

1.A 2.B 3.C 4.D Five Minute Check 3 A.about 10 times B.about 12 times C.about 14 times D.about 16 times It takes the moon 27 days, 7 hours, 43 minutes to orbit the Earth. At this rate, about how many times does the moon orbit the Earth in a year? (over Lesson 7-7)

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