Grade 10 Math: Percent Error Worksheet
Calculate percent error in various scenarios, including measurements and estimations, for Grade 10 math students.
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Grade 10 Math: Percent Error
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Read each question carefully and calculate the percent error. Round your answers to two decimal places where necessary.
1. A student measures the length of a desk to be 155 cm. The actual length of the desk is 150 cm. What is the percent error of the student's measurement?
2. A scientist estimates the weight of a rock sample to be 450 grams. After weighing it on a precise scale, the actual weight is found to be 475 grams. Calculate the percent error of the scientist's estimation.
3. Percent error is calculated by taking the absolute value of the minus the actual value, dividing by the actual value, and then multiplying by 100%.
4. A negative percent error indicates that the measured value is than the actual value.
5. A percent error of 0% means the measured value is exactly the same as the actual value.
True
False
6. Percent error can sometimes be negative.
True
False
7. A student predicted that a reaction would produce 25 grams of product. The actual yield was 20 grams. What is the percent error?
20%
25%
5%
80%
8. Which of the following is the formula for percent error?
|(Actual - Measured) / Measured| x 100%
|(Measured - Actual) / Actual| x 100%
(Measured - Actual) / 100%
Actual / Measured x 100%
9. A student measures the length of the line segment below using the ruler shown. They record the length as 7.2 cm. If the actual length of the segment is 7.5 cm, what is the percent error in their measurement?
10. A thermometer reads a temperature of 98°C, but the actual temperature is 95°C. What is the percent error?