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* *Reflection: Unit Exams
Decimals Unit Exam - Section 2: Administering the Exam

Since this was completely a short answer exam, I was able to see common mistakes made by my students.

#1 - Students answered the first question "what is the greatest number of teams that can enter?" but did not determine the amount of boys and girls on each team.

#2 - Students didn't reverse the order when it states subtracted from.

#4 - Students didn't add the fractions correctly.

#6 - Students found the total cost of $32.60 a month for 8 months, but didn't add the $40 down.

#8 - Since there are many steps to dividing mixed numbers, some students performed one of these steps incorrectly.

#10 - Students misinterpreted the question and used the GCF.

#14 - Students found the perimeter or incorrectly found the area of the rectangles they used.

I used these common mistakes and discussed them with the class after I handed back the exam.

*Common Mistakes*

*Unit Exams: Common Mistakes*

# Decimals Unit Exam

Lesson 10 of 10

## Objective: SWBAT demonstrate their knowledge of decimal operations.

*65 minutes*

#### Test Topics

*5 min*

The following topics are covered on this exam:

- GCF and LCM
- Long division
- Partial products
- Distributive property
- Converting decimals to fractions
- Adding decimals
- Subtracting decimals
- Multiplying decimals
- Dividing decimals
- Divisibility rules
- Perimeter and area of polygons with rational number measurements

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#### Administering the Exam

*60 min*

Students will be reminded that they need to show their work for each problem in order to receive any credit. Also, I will remind students to read the problems thoroughly before deciding on a strategy.

Students should be given 45 - 60 minutes to complete the Decimals Unit Exam. Encourage students to check their work when they are finished.

#### Resources

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##### Similar Lessons

Environment: Urban

Environment: Urban

Environment: Urban

- UNIT 1: First Week of School
- UNIT 2: Properties of Math
- UNIT 3: Divisibility Rules
- UNIT 4: Factors and Multiples
- UNIT 5: Introduction to Fractions
- UNIT 6: Adding and Subtracting Fractions
- UNIT 7: Multiplying and Dividing Fractions
- UNIT 8: Algorithms and Decimal Operations
- UNIT 9: Multi-Unit Summative Assessments
- UNIT 10: Rational Numbers
- UNIT 11: Equivalent Ratios
- UNIT 12: Unit Rate
- UNIT 13: Fractions, Decimals, and Percents
- UNIT 14: Algebra
- UNIT 15: Geometry

- LESSON 1: Adding and Subtracting Decimals with Card Sort Activity
- LESSON 2: Adding and Subtracting Decimals Algorithm
- LESSON 3: Big Multiplication and Long Division
- LESSON 4: Multiplying Decimals Card Sort
- LESSON 5: Multiplying Decimals Algorithm
- LESSON 6: Partial Product Strategy for Multiplying Decimals
- LESSON 7: Dividing Decimals
- LESSON 8: Dividing Decimals with Remainders
- LESSON 9: Operations with Decimals Jeopardy Review
- LESSON 10: Decimals Unit Exam