2.8 - Percent Error

Presentation

•

Mathematics

•

6th - 8th Grade

•

Easy

•

CCSS

6.RP.A.3C, 7.RP.A.3

Standards-aligned

Benny Boyd

Used 2+ times

FREE Resource

10 Slides • 15 Questions

2.8 - Percent Error

Learning target: I will solve problems involving percent error.

Review questions are next.

Multiple Choice

Amy deposits $200 in the bank for 5 years. She earns 5% interest. How much did she make in interest?

$10

$60

$50

$500

Multiple Choice

Howard borrowed $4,000 from the bank at an interest rate of 8%. He has to pay it back in 2 years. How much interest will he pay?

$640

$64

$74

$460

Multiple Choice

What is the equivalent decimal to 14%?

0.14

1.4

14.00

0.014

Math Response

What is the percent error of Doug's estimate?

Round to the nearest tenth, if necessary.

$Percent\ Error:\frac{|actual−estimate|}{\ actual}=\frac{\%}{100}$

Type answer here

Deg^°

Rad

Math Response

What is the percent error of Doug's estimate?

Round to the nearest tenth, if necessary.

$Percent\ Error:\frac{|actual−estimate|}{\ actual}=\frac{\%}{100}$

Type answer here

Deg^°

Rad

Multiple Choice

Find the percent change.
Original amount: 10
New amount: 12

20%

12%

15%

50%

Explanation Slide...

Amount of error : = 12Actual amount : 48Percent error :

Multiple Choice

Mr. Sheridan estimates it will take him 60 minutes to run 8 miles. It actually takes him 48 minutes. What was the percent error in his estimation?

12%

20%

25%

80%

Explanation Slide...

Estimated amount : 10Actual amount : 50Amount of error : Percent error :

Multiple Choice

Mr. J planned for about 10 people to come to his party, but then 50 people came. What is the percent error in his estimation?

20%

80%

400%

500%

Multiple Choice

Zed went to the store and bought a bag of chips. He estimated there would be 350 chips in the package, but realized there were only 210 chips in that package. What was his percent error?

35%

67%

85%

92%

Multiple Choice

The students measured length during a science experiement, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?

15.79%

18.75%

2.25%

18%

Multiple Choice

The attendance for the basketball game was estimated to be 15,000 people but 12,500 people attended. What was the percent error?

16.67%

20%

2500%

80%

Multiple Choice

Jessie estimates the weight of her cat to be 8 pounds. The actual weight of the cat was 10 pounds. Find the percent error.

15%

20%

25%

30%

Multiple Choice

Bob estimates that there will be 230 people who attend the concert. There was an actual total of 300 people who attended. Find the approximate percent error.

23%

33%

27%

37%

Multiple Choice

An archaeologist estimated that a fossil was 520 years old. It was actually 500 years old. What was the percent error?

20%

3.8%

none of these

Multiple Choice

You are purchasing a T.V for $990 T.V with 9% sales tax. What is the final price of the T.V.?

$ 1881.00

$ 1079.00

$ 1,079.10

$ 1,709.1

2.8 - Percent Error

Learning target: I will solve problems involving percent error.

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