Grade: Grade 5 Subject: Mathematics Unit: Decimals Lesson: 6 of 6 SAT: Problem Solving + Data Analysis ACT: Math

Decimals Unit Quiz

Test your understanding of all decimal operations! Work through each problem, then check your answer.

Instructions

Solve each problem on paper first. Then click "Show Answer" to check your work. Keep track of how many you get correct!

Quiz Questions

Question 1: Addition

4.56 + 2.8 = ?
Show Answer

Answer: 7.36

Step 1: Line up decimals: 4.56 + 2.80

Step 2: Add: 4.56 + 2.80 = 7.36

Question 2: Subtraction

8.5 - 3.27 = ?
Show Answer

Answer: 5.23

Step 1: Line up decimals: 8.50 - 3.27

Step 2: Subtract: 8.50 - 3.27 = 5.23

Question 3: Multiplication

3.4 x 0.2 = ?
Show Answer

Answer: 0.68

Step 1: Multiply: 34 x 2 = 68

Step 2: Count decimal places: 1 + 1 = 2

Step 3: Place decimal: 0.68

Question 4: Division

7.2 ÷ 0.9 = ?
Show Answer

Answer: 8

Step 1: Move decimal: 72 ÷ 9

Step 2: Divide: 72 ÷ 9 = 8

Question 5: Comparing Decimals

Which is greater: 0.7 or 0.65?
Show Answer

Answer: 0.7

Convert to same place: 0.70 vs 0.65

70 hundredths > 65 hundredths

Question 6: Word Problem

A book costs $12.75 and a notebook costs $3.50. How much do they cost together?
Show Answer

Answer: $16.25

$12.75 + $3.50 = $16.25

Question 7: Multiplication with More Decimal Places

0.25 x 0.4 = ?
Show Answer

Answer: 0.100 or 0.1

Step 1: Multiply: 25 x 4 = 100

Step 2: Count decimal places: 2 + 1 = 3

Step 3: Place decimal: 0.100 = 0.1

Question 8: Word Problem - Division

You have 4.5 meters of ribbon to cut into pieces that are 0.5 meters each. How many pieces can you make?
Show Answer

Answer: 9 pieces

4.5 ÷ 0.5 = 45 ÷ 5 = 9

Question 9: Order Decimals

Order from least to greatest: 0.5, 0.05, 0.55, 0.15
Show Answer

Answer: 0.05, 0.15, 0.5, 0.55

Convert: 0.50, 0.05, 0.55, 0.15

Order: 5, 15, 50, 55 hundredths

Question 10: Mixed Operations

If 1 pound of apples costs $2.40, how much do 2.5 pounds cost?
Show Answer

Answer: $6.00

$2.40 x 2.5 = $6.00

240 x 25 = 6000, with 3 decimal places = 6.000 = $6.00

Score Your Quiz

How Did You Do?

9-10 correct: Excellent! You have mastered decimals!

7-8 correct: Great job! Review any topics you missed.

5-6 correct: Good effort! Consider reviewing the earlier lessons.

Below 5: Keep practicing! Go back through the unit lessons.

Unit Summary

Addition/Subtraction

Line up decimal points, add zeros as needed.

Multiplication

Multiply as whole numbers, count total decimal places.

Division

Move decimal to make divisor whole, then divide.

Comparing

Add zeros to make same place value, then compare.

Congratulations!

You have completed the Decimals unit. Continue to the next unit to keep building your math skills!